BR/SUxxxUC Series
UL 489 and UL 1077 – AC/DC Rated
Miniature Circuit Breakers
Weidmuller, Canada
10 Spy Court
Markham, Ontario L3R 5H6
Telephone: (800) 268-4080
Facsimile: (877) 300-5635
Email: info1@weidmuller.ca
Website: www.weidmuller.ca
Weidmuller, Mexico
Blvd. Hermanos Serdán 698,
Col. San Rafael Oriente
Puebla, Puebla, Mexico
C.P. 72029
Telephone: 01 222 2686267
Facsimile: 01 222 2686219
Email: clientes@weidmuller.com.mx
Website: www.weidmuller.com.mx
Weidmuller, United States
821 Southlake Blvd.
Richmond, Virginia 23236
Telephone: (800) 849-9343
Facsimile: (804) 379-2593
Email: info@weidmuller.com
Website: www.weidmuller.com
Weidmuller – Your partner in Industrial Connectivity
As experienced experts we support our customers and partners around the world
with products, solutions and services in the industrial environment of power,
signal and data. We are at home in their industries and markets and know the
technological challenges of tomorrow. We are therefore continuously developing
innovative, sustainable and useful solutions for their individual needs. Together we
set standards in Industrial Connectivity.
Visit our BR/SUxxxUC Series Circuit Breakers website page for more information:
www.weidmuller.com/BRSUxxxUCSeries
www.weidmuller.com 06/17 • 3M • LIT1617
Application Schematic
Sizing of main branch circuit protector according
to table 430.52 in NEC®
•Dual Element (Time Delay) Fuse
Maximum fuse = largest motor FLA x 175%
+ FLA of all other motors and general loads in group
•Inverse Time Breaker
Maximum circuit breaker = largest motor FLA x 250%
+ FLA of all other motors and general loads in group
(for other fuse/breaker types see table 430.52)
Power Circuit
Outlet
Power Circuit
Power
Transformer
Control Circuit
Control Transformer
Power
Transformer
UL1077
SU2xxUC
UL1077
SU1xxUC
Fixed mounted
cabinet /panel heater
(resistive loads)
UL489
BR2xxUC
BR2xxUC
BR1xxUC
BR1xxUC
UL489
BR2xxUC
UL489
UL489
BR1xxUC
UL489
M M
UL489
UL489
BR3xxUC
UL489
BR3xxUC
UL1077
SU1xxUC
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
GL1 L2 L3
UL 489 and UL 1077 DIN-Rail Miniature Circuit Breakers
Weidmuller offers a complete line of thermal magnetic circuit breakers with its BRxxxUC product line engineered for either
AC or DC branch circuit protection and the SUxxxUC product line designed for supplementary protection. These circuit
breakers are proven solutions to protect your wires and cables from application or device malfunctions.
Introduction ......................................................................................................................................................... 2
Choose the Right Weidmuller BR/SUxxxUC Series Miniature Circuit Breaker ...................... 2
Applications ............................................................................................................................................ 3
BR and SU Series Product Overview ........................................................................................................ 4
UL 489 DIN-Rail Branch Circuit Breakers ............................................................................................... 5
BRxxxUC Product Selection ............................................................................................................... 6
UL 1077 DIN-Rail Supplementary Circuit Breakers ........................................................................... 7
SUxxxUC Product Selection . .............................................................................................................. 8
Trip Curves ........................................................................................................................................................... 9
Accessories ....................................................................................................................................................... 11
Accessory Modules ........................................................................................................................... 11
Auxiliary Contact ......................................................................................................................... 11
Bell Alarm Contact ...................................................................................................................... 12
Shunt Trip ...................................................................................................................................... 13
Accessory Modules Installation Diagram .................................................................................... 14
Accessory Modules Mounting Instructions ................................................................................ 15
Busbar and Busbar Accessories ...................................................................................................... 16
Busbar UL 489 – Cuttable ........................................................................................................ 16
Busbar UL 1077 – Cuttable ...................................................................................................... 18
Terms ................................................................................................................................................................... 20
Additional Technical Information ........................................................................................................... 21
Operation and Components of BR/SUxxxUC MCBs ................................................................. 21
WeidmullerUCSeriesThermalMagneticDenition ................................................................ 22
Examples of Trip Curve Interpretation – Reading Trip Curves ................................................ 23
Ambient Temperature Derating ...................................................................................................... 24
UC Series D Curve Thermal Magnetic Tripping Characteristics vs K Curve ........................ 25
Additional Weidmuller Offerings ........................................................................................................... 27
CB4200 Series Circuit Breakers ..................................................................................................... 27
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
1
Introduction
Choose the Right Weidmuller BR/SUxxxUC
Series Miniature Current Breaker (MCB)
(Always refer to the NEC before installing any device.)
When considering the BR/SUxxxUC Series MCBs, always assess the application for the following: voltage rating,
maximum interrupting capacity, continuous current rating, frequency, and atypical operating conditions (ambient
temperature, moisture, vibration, altitude, installation or operation orientation, and field maintenance). The MCBs are
intended to protect the circuit cables as well as motors, generators and transformers, thyristors and silicon rectifiers.
They also provide additional protection of computers and their peripheral equipment, industrial process control systems,
telecommunications equipment and power supplies.
Ask the following:
• Is the application an AC or DC circuit?
Good news here, BR/SUxxxUC MCBs are rated for both AC
and DC.
• Is a branch or supplemental breaker needed for the
application?
Branch devices may be used in place of supplemental but
not vise versa.
• How many poles are needed for each circuit being protected?
3p – 3 phase no neutral, 2p – L1 and Neutral, 1p – L1 only.
• Calculate and/or measure the normal current for the circuit
and follow NEC guidelines. Match the breaker amps based on
the normal current load. Weidmuller’s BR/SUxxxUC run 1 to
63 amps (See Technical Data on page 4).
• Determine potential failure mode(s).
BR/SUxxxUC MCB thermal magnetic devices are designed for
interrupt short-circuit and overload events.
• What is the interrupt capacity (IC)?
Specify the breaker knowing the maximum fault current that
can be repeatedly interrupted without failure of the breaker.
BR/SUxxxUC MCBs have a maximum current at a given
voltage that the breaker can interrupt safely without damage
to surrounding components. (See Technical Data)
• What is the reaction time needed to a given fault condition?
Specify a breaker by selecting a speed that avoids nuisance
tripping but protects against component damage (B, C or
D curve)
• What are the functional requirements of the breaker?
The BR/SUxxxUC are rail mountable, easy to visually inspect,
switch manually (or remotely trip with shunt trip devices)
and monitor using an auxiliary contact. Mechanically 20,000
cycles and electrically 6,000 cycles.
• What is the wire size used? Can the breaker accept the wire
sizes required?
TheBR/SUxxxUCaredesignedfor≤35mm².
• What are the environmental factors: ambient temperature,
moisture, vibration?
Check to determine if there are unusual conditions in which
the breaker must operate. The BR/SUxxxUC are specified to
IP20, -35°C ...70°C, and shock tested to IEC 60068-2-27.
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
2
Applications
• Automotive Manufacturing
• Chemical, Oil and Gas
• Renewable Energy
• Rail Vehicles
• Automation
• Pharmaceutical and Food
• Steel Production
• Telecom and Datacom
• Power-D-Box-Systems
• Lighting Equipment
• Process Control
Rail Vehicles
Chemical, Oil and Gas
Automotive Manufacturing
Pharmaceutical and Food
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
3
Degree of protection IP20
Vibration (sinusoidal) test to
IEC 60068-2-6, test Fc
± 0.38 mm (10–57 Hz), 5 g (57–500 Hz)
10 frequency cycles per axis
Shock, test to
IEC 60068-2-27, test Ea
30 g (11 ms)
Corrosion, test to
IEC 60068-2-11, test Ka
96 hrs in 5% salt mist
Humidity, test to
IEC 60068-2-78, test Cab
48 hours at 95% RH, temperature +40°C
Terminals screw terminals; Vertical connection
possible by means of busbars
Tightening torque 2 Nm max.
Cable cross section ≤35mm²
Ambient temperature -35°C...+70°C
Mounting rail mounting
Mass approx. 116 g per pole
(EN 60947-2/ UL 1077)
approx. 131 g per pole
(UL 489)
Approvals
Approval
authority Standard Rated voltage Current ratings
TÜV IEC/EN
60947-2
AC 240/415 V
DC 80 V
DC 125 V
1...63 A
1...63 A (1-pole)
1...63 A
(2 poles in series)
UL UL 1077 /
CSA-C22.2
No. 235
AC 480Y/277 V
DC 60 V
DC 125 V
1...63 A
1...63 A (1-pole)
1...63 A
(2 poles in series)
UL UL 489 /
CSA-C22.2
No. 5
AC 240 V
AC 480Y/277 V
DC 60 V
DC 125 V
1...63 A
1...32 A
1...63 A (1-pole)
1...63 A
(2 poles in series)
to UL1077
Number
of poles Un In TC OL SC
1-pole AC 240 V 1...63 A 1 1 7.5 kA, U1
1-pole AC 277 V 1...63 A 1 0 5 kA, U1
2-, 3-pole AC 480 V 1...63 A 1 1 5 kA, U1
1-pole DC 60 V 1...63 A 1 0 7.5 kA, U1
2-pole in
series
DC 125 V 1...63 A 1 0 7.5 kA, U1
Insulation coordination 6 kV/3 (reinforced insulation at operating area)
Interupt capacity
to IEC/EN 60947-2 (Ics) AC 7,500 A / DC 10,000 A
to IEC/EN 60947-2 (Icu) AC/DC 10,000 A
to UL 489 AC/DC 10,000 A
BR and SU Series
Description
1-, 2- and 3-pole thermal-magnetic miniature circuit breakers
(MCBs) in accordance with EN 60947-2, UL 1077 and UL
489 for DIN-rail mounting, with toggle actuation, visual status
indication and high rupture capacity. A positively trip-free snap
action mechanism ensures reliable switching behavior. A range
of trip characteristics and add-on modules allow a great variety
of applications.
Typical Applications
• Protection of cables, motors, generators and transformers,
thyristorsandsiliconrectiers.
• Protection of computers and their peripheral equipment,
industrial process control systems, telecommunications
equipment, power supplies.
Technical Data
Voltage rating and current rating range
to IEC/EN 60947-2 1-pole: AC 240 V; 1 A…63 A;
2 and 3-pole: AC 415 V, 1 A…63 A
1-pole: DC 80 V, 1 A...63 A
2-pole: (2 poles connected in series)
DC 125 V, 1...63 A
to UL 1077 1-pole: AC 277 V; 1 A…63 A;
2 and 3-pole: AC 480Y/277 V, 1 A…63 A
1-pole: DC 60 V; 1 A...63 A
2-pole (2 poles connected in series):
DC 125 V; 1 A...63 A
to UL 489 1-pole: AC 120 V; 1 A…63 A;
2 and 3-pole: AC 240 V, 1 A…63 A;
1-pole: AC 277 V; 1 A…32 A;
2 and 3-pole: AC 480Y/277 V; 1 A…32 A;
1-pole: DC 60 V; 1 A…63 A
2-pole (2 poles connected in series);
DC 125 V; 1 A…63 A
Typical life
Mechanically 20,000 cycles
Electrically 6,000 cycles
BR Series UL 489 version
SU Series IEC/EN60947-2 & UL 1077 version
For information on Weidmuller’s UL Certications, visit
the UL Online Certications Directory and search by the
UL le numbers E359481, E362204 and E359964.
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
4
UL 489 DIN-Rail Branch
Circuit Breakers
BRxxxUC
BR Series Product Selection
Part Number Nomenclature
(Part Number found on the front of the breaker) BR
BR = Branch Rated Circuit Breakers
Rated Amps = 1, 1.2, 1.5, 1.6, 2, 3, 4, 5, 6, 7, 8, 10,
12, 13, 15, 16, 20, 25, 30, 32, 35, 40, 50, 60, 63
No. of Poles = 1, 2 or 3 Curve = B, C or D
AC/DC Rated
2 D 60 UC
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
5
Dimensions – UL 489 versionSchematic Diagrams
DC Application
When using the BR/SUxxxUC in DC applications, polarity does
not have to be observed. Maximum acceptable voltage between
the conductors depends on the number of poles, circuitry and
relevant standard / approval.
1-pole 2-pole 3-pole
60.2 ± 0.3
49.8 ± 0.3
5.5 ± 0.3
9 ± 0.3
82 max.
45 ± 0.3
60.2 ± 0.3
52.9 ± 0.6
60.1 ± 0.3
5.5 ± 0.3
9 ± 0.3
116 ± 0.4
45 ± 0.3
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
52.9 ± 0.6
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
1
2
3-pole
1-pole 2-pole
1
2
3
4
1
2
3
4
5
6
To IEC/EN 60947-2:
To UL 489:
1
2
80 V0 V125 V0 V
0 V125 V
125 V0 V80 V
80 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
1
2
60 V0 V125 V0 V
0 V125 V
125 V0 V60 V
60 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
60.2 ± 0.3
49.8 ± 0.3
5.5 ± 0.3
9 ± 0.3
82 max.
45 ± 0.3
60.2 ± 0.3
52.9 ± 0.6
60.1 ± 0.3
5.5 ± 0.3
9 ± 0.3
116 ± 0.4
45 ± 0.3
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
52.9 ± 0.6
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
1
2
3-pole
1-pole 2-pole
1
2
3
4
1
2
3
4
5
6
To IEC/EN 60947-2:
To UL 489:
1
2
80 V0 V125 V0 V
0 V125 V
125 V0 V80 V
80 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
1
2
60
V0 V125 V0 V
0 V125 V
125 V0 V60 V
60 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
60.2 ± 0.3
49.8 ± 0.3
5.5 ± 0.3
9 ± 0.3
82 max.
45 ± 0.3
60.2 ± 0.3
52.9 ± 0.6
60.1 ± 0.3
5.5 ± 0.3
9 ± 0.3
116 ± 0.4
45 ± 0.3
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
52.9 ± 0.6
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
1
2
3-pole
1-pole 2-pole
1
2
3
4
1
2
3
4
5
6
To IEC/EN 60947-2:
To UL 489:
1
2
80 V0 V125 V0 V
0 V125 V
125 V0 V80 V
80 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
1
2
60 V0 V125 V0 V
0 V125 V
125 V0 V60 V
60 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
All dimensions without tolerances are for reference only. Weidmuller
reservestherighttochangespecicationsatanytimewithoutnoticein
the interest of improved design, performance and cost effectiveness.
BR Series Product Selection
x = B, C, or D Curve
(See Curve Drawings on page 9 and 10)
Amps 1 Pole 2 Pole 3 Pole
1BR1x1UC MCB 489 1P x 1A ACDC BR2x1UC MCB 489 2P x 1A ACDC BR3x1UC MCB 489 3P x 1A ACDC
1.2 BR1x1.2UC MCB 489 1P x 1.2A ACDC BR2x1.2UC MCB 489 2P x 1.2A ACDC BR3x1.2UC MCB 489 3P x 1.2A ACDC
1.5 BR1x1.5UC MCB 489 1P x 1.5A ACDC BR2x1.5UC MCB 489 2P x 1.5A ACDC BR3x1.5UC MCB 489 3P x 1.5A ACDC
1.6 BR1x1.6UC MCB 489 1P x 1.6A ACDC BR2x1.6UC MCB 489 2P x 1.6A ACDC BR3x1.6UC MCB 489 3P x 1.6A ACDC
2BR1x2UC MCB 489 1P x 2A ACDC BR2x2UC MCB 489 2P x 2A ACDC BR3x2UC MCB 489 3P x 2A ACDC
3BR1x3UC MCB 489 1P x 3A ACDC BR2x3UC MCB 489 2P x 3A ACDC BR3x3UC MCB 489 3P x 3A ACDC
4BR1x4UC MCB 489 1P x 4A ACDC BR2x4UC MCB 489 2P x 4A ACDC BR3x4UC MCB 489 3P x 4A ACDC
5BR1x5UC MCB 489 1P x 5A ACDC BR2x5UC MCB 489 2P x 5A ACDC BR3x5UC MCB 489 3P x 5A ACDC
6BR1x6UC MCB 489 1P x 6A ACDC BR2x6UC MCB 489 2P x 6A ACDC BR3x6UC MCB 489 3P x 6A ACDC
7BR1x7UC MCB 489 1P x 7A ACDC BR2x7UC MCB 489 2P x 7A ACDC BR3x7UC MCB 489 3P x 7A ACDC
8BR1x8UC MCB 489 1P x 8A ACDC BR2x8UC MCB 489 2P x 8A ACDC BR3x8UC MCB 489 3P x 8A ACDC
10 BR1x10UC MCB 489 1P x 10A ACDC BR2x10UC MCB 489 2P x 10A ACDC BR3x10UC MCB 489 3P x 10A ACDC
12 BR1x12UC MCB 489 1P x 12A ACDC BR2x12UC MCB 489 2P x 12A ACDC BR3x12UC MCB 489 3P x 12A ACDC
13 BR1x13UC MCB 489 1P x 13A ACDC BR2x13UC MCB 489 2P x 13A ACDC BR3x13UC MCB 489 3P x 13A ACDC
15 BR1x15UC MCB 489 1P x 15A ACDC BR2x15UC MCB 489 2P x 15A ACDC BR3x15UC MCB 489 3P x 15A ACDC
16 BR1x16UC MCB 489 1P x 16A ACDC BR2x16UC MCB 489 2P x 16A ACDC BR3x16UC MCB 489 3P x 16A ACDC
20 BR1x20UC MCB 489 1P x 20A ACDC BR2x20UC MCB 489 2P x 20A ACDC BR3x20UC MCB 489 3P x 20A ACDC
25 BR1x25UC MCB 489 1P x 25A ACDC BR2x25UC MCB 489 2P x 25A ACDC BR3x25UC MCB 489 3P x 25A ACDC
30 BR1x30UC MCB 489 1P x 30A ACDC BR2x30UC MCB 489 2P x 30A ACDC BR3x30UC MCB 489 3P x 30A ACDC
32 BR1x32UC MCB 489 1P x 32A ACDC BR2x32UC MCB 489 2P x 32A ACDC BR3x32UC MCB 489 3P x 32A ACDC
35 BR1x35UC MCB 489 1P x 35A ACDC BR2x35UC MCB 489 2P x 35A ACDC BR3x35UC MCB 489 3P x 35A ACDC
40 BR1x40UC MCB 489 1P x 40A ACDC BR2x40UC MCB 489 2P x 40A ACDC BR3x40UC MCB 489 3P x 40A ACDC
50 BR1x50UC MCB 489 1P x 50A ACDC BR2x50UC MCB 489 2P x 50A ACDC BR3x50UC MCB 489 3P x 50A ACDC
60 BR1x60UC MCB 489 1P x 60A ACDC BR2x60UC MCB 489 2P x 60A ACDC BR3x60UC MCB 489 3P x 60A ACDC
63 BR1x63UC MCB 489 1P x 63A ACDC BR2x63UC MCB 489 2P x 63A ACDC BR3x63UC MCB 489 3P x 63A ACDC
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
6
UL 1077 DIN-Rail Supplementary
Circuit Breakers
SUxxxUC
SU Series Product Selection
Part Number Nomenclature
(Part Number found on the front of the breaker) SU
SU = Supplementary Protectors Rated Amps = 1, 1.2, 1.5, 1.6, 2, 3, 4, 5, 6, 7, 8, 10,
12, 13, 15, 16, 20, 25, 30, 32, 35, 40, 50, 60, 63
No. of Poles = 1, 2 or 3 Curve = B, C or D
AC/DC Rated
2 D 60 UC
Schematic Diagrams
DC Application
When using the BR/SUxxxUC in DC applications, polarity does
not have to be observed. Maximum acceptable voltage between
the conductors depends on the number of poles, circuitry and
relevant standard / approval.
1-pole 2-pole 3-pole
60.2 ± 0.3
49.8 ± 0.3
5.5 ± 0.3
9 ± 0.3
82 max.
45 ± 0.3
60.2 ± 0.3
52.9 ± 0.6
60.1 ± 0.3
5.5 ± 0.3
9 ± 0.3
116 ± 0.4
45 ± 0.3
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
52.9 ± 0.6
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
1
2
3-pole
1-pole 2-pole
1
2
3
4
1
2
3
4
5
6
To IEC/EN 60947-2:
To UL 489:
1
2
80 V0 V125 V0 V
0 V125 V
125 V0 V80 V
80 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
1
2
60 V0 V125 V0 V
0 V125 V
125 V0 V60 V
60 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
60.2 ± 0.3
49.8 ± 0.3
5.5 ± 0.3
9 ± 0.3
82 max.
45 ± 0.3
60.2 ± 0.3
52.9 ± 0.6
60.1 ± 0.3
5.5 ± 0.3
9 ± 0.3
116 ± 0.4
45 ± 0.3
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
52.9 ± 0.6
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
1
2
3-pole
1-pole 2-pole
1
2
3
4
1
2
3
4
5
6
To IEC/EN 60947-2:
To UL 1077:
1
2
80
V0 V125 V0 V
0 V125 V
125 V0 V80 V
80 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
1
2
60
V0 V125 V0 V
0 V125 V
125 V0 V60 V
60 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
Dimensions – IEC/EN 60947-2 / UL1077 version
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
7
60.2 ± 0.3
49.8 ± 0.3
5.5 ± 0.3
9 ± 0.3
82 max.
45 ± 0.3
60.2 ± 0.3
52.9 ± 0.6
60.1 ± 0.3
5.5 ± 0.3
9 ± 0.3
116 ± 0.4
45 ± 0.3
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
52.9 ± 0.6
35.3 ± 0.4
17.6 ± 0.2
1 P
2 P
3 P
1
2
3-pole
1-pole 2-pole
1
2
3
4
1
2
3
4
5
6
To IEC/EN 60947-2:
To UL 489:
1
2
80 V0 V125 V0 V
0 V125 V
125 V0 V80 V
80 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
1
2
60 V0 V125 V0 V
0 V125 V
125 V0 V60 V
60 V
0 V
1
2
3
4
3
4
3
4
1
2
1
2
( ) ( ) ( )
Load Load
Load
Load
Load
All dimensions without tolerances are for reference only. Weidmuller
reservestherighttochangespecicationsatanytimewithoutnoticein
the interest of improved design, performance and cost effectiveness.
SU Series Product Selection
x = B, C, or D Curve
(See Curve Drawings on page 9 and 10)
Amps 1 Pole 2 Pole 3 Pole
1SU1x1UC MCB 1077 1P x 1A ACDC SU2x1UC MCB 1077 2P x 1A ACDC SU3x1UC MCB 1077 3P x 1A ACDC
1.2 SU1x1.2UC MCB 1077 1P x 1.2A ACDC SU2x1.2UC MCB 1077 2P x 1.2A ACDC SU3x1.2UC MCB 1077 3P x 1.2A ACDC
1.5 SU1x1.5UC MCB 1077 1P x 1.5A ACDC SU2x1.5UC MCB 1077 2P x 1.5A ACDC SU3x1.5UC MCB 1077 3P x 1.5A ACDC
1.6 SU1x1.6UC MCB 1077 1P x 1.6A ACDC SU2x1.6UC MCB 1077 2P x 1.6A ACDC SU3x1.6UC MCB 1077 3P x 1.6A ACDC
2SU1x2UC MCB 1077 1P x 2A ACDC SU2x2UC MCB 1077 2P x 2A ACDC SU3x2UC MCB 1077 3P x 2A ACDC
3SU1x3UC MCB 1077 1P x 3A ACDC SU2x3UC MCB 1077 2P x 3A ACDC SU3x3UC MCB 1077 3P x 3A ACDC
4SU1x4UC MCB 1077 1P x 4A ACDC SU2x4UC MCB 1077 2P x 4A ACDC SU3x4UC MCB 1077 3P x 4A ACDC
5SU1x5UC MCB 1077 1P x 5A ACDC SU2x5UC MCB 1077 2P x 5A ACDC SU3x5UC MCB 1077 3P x 5A ACDC
6SU1x6UC MCB 1077 1P x 6A ACDC SU2x6UC MCB 1077 2P x 6A ACDC SU3x6UC MCB 1077 3P x 6A ACDC
7SU1x7UC MCB 1077 1P x 7A ACDC SU2x7UC MCB 1077 2P x 7A ACDC SU3x7UC MCB 1077 3P x 7A ACDC
8SU1x8UC MCB 1077 1P x 8A ACDC SU2x8UC MCB 1077 2P x 8A ACDC SU3x8UC MCB 1077 3P x 8A ACDC
10 SU1x10UC MCB 1077 1P x 10A ACDC SU2x10UC MCB 1077 2P x 10A ACDC SU3x10UC MCB 1077 3P x 10A ACDC
12 SU1x12UC MCB 1077 1P x 12A ACDC SU2x12UC MCB 1077 2P x 12A ACDC SU3x12UC MCB 1077 3P x 12A ACDC
13 SU1x13UC MCB 1077 1P x 13A ACDC SU2x13UC MCB 1077 2P x 13A ACDC SU3x13UC MCB 1077 3P x 13A ACDC
15 SU1x15UC MCB 1077 1P x 15A ACDC SU2x15UC MCB 1077 2P x 15A ACDC SU3x15UC MCB 1077 3P x 15A ACDC
16 SU1x16UC MCB 1077 1P x 16A ACDC SU2x16UC MCB 1077 2P x 16A ACDC SU3x16UC MCB 1077 3P x 16A ACDC
20 SU1x20UC MCB 1077 1P x 20A ACDC SU2x20UC MCB 1077 2P x 20A ACDC SU3x20UC MCB 1077 3P x 20A ACDC
25 SU1x25UC MCB 1077 1P x 25A ACDC SU2x25UC MCB 1077 2P x 25A ACDC SU3x25UC MCB 1077 3P x 25A ACDC
30 SU1x30UC MCB 1077 1P x 30A ACDC SU2x30UC MCB 1077 2P x 30A ACDC SU3x30UC MCB 1077 3P x 30A ACDC
32 SU1x32UC MCB 1077 1P x 32A ACDC SU2x32UC MCB 1077 2P x 32A ACDC SU3x32UC MCB 1077 3P x 32A ACDC
35 SU1x35UC MCB 1077 1P x 35A ACDC SU2x35UC MCB 1077 2P x 35A ACDC SU3x35UC MCB 1077 3P x 35A ACDC
40 SU1x40UC MCB 1077 1P x 40A ACDC SU2x40UC MCB 1077 2P x 40A ACDC SU3x40UC MCB 1077 3P x 40A ACDC
50 SU1x50UC MCB 1077 1P x 50A ACDC SU2x50UC MCB 1077 2P x 50A ACDC SU3x50UC MCB 1077 3P x 50A ACDC
60 SU1x60UC MCB 1077 1P x 60A ACDC SU2x60UC MCB 1077 2P x 60A ACDC SU3x60UC MCB 1077 3P x 60A ACDC
63 SU1x63UC MCB 1077 1P x 63A ACDC SU2x63UC MCB 1077 2P x 63A ACDC SU3x63UC MCB 1077 3P x 63A ACDC
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
8
Trip Curves
Trip Curves B, C, D – overcurrent protection of cables in
accordance with IEC/EN 60898-1 and IEC 60947-2
Time/Current Characteristics
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
...times rated current
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
Trip time in seconds
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
...times rated current
Trip time in seconds
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
...times rated current
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
Trip time in seconds
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
...times rated current
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
Trip time in seconds
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
...times rated current
Trip time in seconds
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
...times rated current
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
Trip time in seconds
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
Curve B / 1 ... 63 A
Curve C / 1 ... 63 A
Trip between 3-5X rated current
(30-50 Amp for a 10 Amp device)
Residential and light commercial applications such as:
• Resistive loads (low surge current)
• Low switching surge current
• Wire protection
• Lighting
• Appliances
Trip between 5-10X rated current
(50-100 Amp for a 10 Amp device)
Commercial applications such as:
• Inductive loads
• Motors (low inrush current)
• Control circuitry
• Lighting
• Appliances
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
9
Current ratings and voltage drop at +25°C
Voltage drop in V at 1 IN
IN (A) 1 1.2 1.5 1.6 2 3
V 1.50 1.50 0.80 0.80 0.80 0.60
IN (A) 4 5 6 7 8 10
V 0.60 0.20 0.20 0.20 0.15 0.15
IN (A) 12 13 15 16 20 25
V 0.15 0.10 0.10 0.10 0.08 0.08
IN (A) 30 32 35 40 50 60
V 0.07 0.07 0.07 0.07 0.06 0.06
IN (A) 63
V 0.06
Note: When mounted side-by-side, the breakers can only carry up to 80%
of their rated current or a higher rating has to be selected
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
...times rated current
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
Trip time in seconds
Curve D / 1 ... 63 A
Trip between 10-20X rated current
(100-200 Amp for a 10 Amp device)
Industrial applications such as:
• High inductive and capacitive loads
• Motors (higher inrush current)
• Power supplies
• Transformers
• Heaters
• X-ray machines
• Reactive loads
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
10
Accessories
Accessory Modules
Auxiliary Contact
Description
Add-on module for circuit breaker type BR/SUxxxUC. The
auxiliary switch has a change-over contact as signal contact
and is operated with actuation of the MCB. The module has
screw terminals and is rated for AC and DC voltages.
Typical Applications
Status monitoring of MCB and/or the connected loads.
Description Part Number
MCB AUX Contact 1NC BAU10UC
Technical Data
Rated currents to IEC/EN 60947-5-1:
Voltage
ratings:
AC 240 V AC 415 V DC 24 V DC 48 V DC 130 V
Current
ratings:
6 A 3 A 6 A 2 A 1 A
Rated currents to UL 489:
Voltage
ratings:
AC 12
… 240 V
AC 277 V DC 12
... 24 V
DC 48 V DC 110
... 220 V
Current
ratings:
6 A 3 A 6 A 3 A 1.5 A
Typical life 20,000 cycles
Tightening torque 1 Nm max.
Ambient temperature -35°C ...+70°C
Width 9 mm
Mass approx. 29 g
Approvals
Approval authority Standard
TÜV IEC/EN 60947-5-1
UL UL 489
Schematic Diagrams
Dimensions (in millimeters)
11
12 14
81 ± 0.5
45 ± 0.5
85.8 ± 0.5
9
66 ± 0.5
60.4 ± 0.5
5.5 ± 0.5
11
12 14
81 ± 0.5
45 ± 0.5
85.8 ± 0.5
9
66 ± 0.5
60.4 ± 0.5
5.5 ± 0.5
Note:
As soon as the auxiliary contact module is
mounted on the MCB, the terminals 11 and 14
are connected when the MCB is in ON condi-
tion. Terminals 11 and 12 are connected when
the MCB is in OFF condition.
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
11
Bell Alarm Contact
Description
Add-on module for MCB type BR/SUxxxUC. The bell alarm
contact has a change-over contact as signal contact. There
will only be a signal when the MCB tripped on grounds of a
failure (overload, short circuit), but and not when the MCB was
switched on or off manually.
By actuating the reset lever on the front the tripping signal is
acknowledged.
Typical Applications
Status monitoring of MCB and/or the connected loads.
Mounting
The add-on module is mounted on the left side of the MCB
(seen from the front). For mounting, the MCB has to be in the
OFF position.
Description Part Number
MCB Bell Alarm Contact 1NC/1NO BAU11UC
Technical Data
Rated currents to IEC/EN 60947-5-1:
Voltage
ratings:
AC 240 V AC 415 V DC 24 V DC 48 V DC 130 V
Current
ratings:
6 A 3 A 6 A 2 A 1 A
Rated currents to UL 489:
Voltage
ratings:
AC 12
… 240 V
AC 277 V DC 12
... 24 V
DC 48 V DC 110
... 220 V
Current
ratings:
6 A 3 A 6 A 3 A 1.5 A
Typical life 20,000 cycles
Tightening torque 1 Nm max.
Ambient temperature -35°C ...+70°C
Width 9 mm
Mass approx. 29 g
Approvals
Approval authority Standard
UL UL 489
Schematic Diagrams
Dimensions (in millimeters)
Note:
As soon as the bell alarm contact module is
mounted on the MCB, the terminals 91 and
92 are connected when the MCB is in ON
condition; the terminals 91 and 94 are con-
nected when the MCB tripped electrically; the
terminals 91 and 92 are connected when the
MCB was tripped manually; at the same time
the terminals 91 and 94 do not have contact.
91
94 92
81 ± 0.5
45 ± 0.5
85.8 ± 0.5
9
66 ± 0.5
60.4 ± 0.5
5.5 ± 0.5
91
94 92
81 ± 0.5
45 ± 0.5
85.8 ± 0.5
9
66 ± 0.5
60.4 ± 0.5
5.5 ± 0.5
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
12
Shunt Trip
Description
Add-on module for MCB type BR/SUxxxUC. The shunt trip
module serves for remote trip of the MCB and for signalling
whether the MCB was tripped electrically or manually.
Typical Applications
Electrical remote trip of safety equipment with simultaneous
monitoring of MCB status or its connected load.
Mounting
The add-on module is mounted on the left side of the MCB
(seen from the front). For mounting, the MCB has to be in the
OFF position. When auxiliary contact module/bell alarm contact
module and a shunt trip module are mounted at the same time,
theshunttripmodulealwayshastobemountedrst.
Description Part Number
MCB SHUNT 1NC/1NO 12VDC BST12VDC
MCB SHUNT 1NC/1NO 24VDC BST24VDC
MCB SHUNT 1NC/1NO 48VDC BST48VDC
MCB SHUNT 1NC/1NO 125VDC BST125VDC
MCB SHUNT 1NC/1NO 120VA VAC BST120VAC
MCB SHUNT 1NC/1NO 240VA VAC BST240VAC
MCB SHUNT 1NC/1NO 277VA VAC BST277VAC
Technical Data
Voltage ratings AC AC 277 V AC 240 V AC 120 V
Min. trip voltage AC 160 V AC 160 V AC 80 V
Power consumption
min. response power
240 W
35 W
200 W
35 W
200 W
35 W
Rated current of
auxiliary contact
3 A 6 A 6 A
Voltage ratings DC DC 125 V DC 48 V DC 24 V DC 12 V
Min. trip voltage DC 80 V DC 24 V DC 16 V DC 8 V
Power consumption
min. response power
200 W
30 VA
200 W
30 VA
200 W
30 VA
200 W
30 VA
Rated current of
auxiliary contact
1.5 A 2 A 6 A 6 A
Trip time < 10 ms
Typical life 20,000 cycles
Tightening torque 1 Nm max.
Ambient temperature -35°C...+70°C
Width 18 mm
Mass approx. 60 g
Approvals
Approval authority Standard
UL UL 489
Schematic Diagrams
Dimensions (in millimeters)
81 ± 0.5
45 ± 0.5
83 ± 0.5
18 max.
66 ± 0.5
60.1 ± 0.5
5.5 ± 0.5
L / +
N / -
11
1214
FA
C2
C1
81 ± 0.5
45 ± 0.5
83 ± 0.5
18 max.
66 ± 0.5
60.1 ± 0.5
5.5 ± 0.5
L / +
N / -
11
1214
FA
C2
C1
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
13
Shunt Trip
Bell Alarm
Bell Alarm
Auxiliary
Auxiliary
Bell AlarmBell Alarm
Auxiliary
Auxiliary
Auxiliary
Auxiliary
BR/SUxxxUC
Compatibility
Type Part Number Mount
Position* BRxxxUC SUxxxUC
Auxiliary Contact Module BAU10UC Left X X
Bell Alarm Contact Module BAU11UC Left X X
Shunt Trip Module
BST12VDC Left X X
BST24VDC Left X X
BST48VDC Left X X
BST125VDC Left X X
BST120VAC Left X X
BST240VAC Left X X
BST277VAC Left X X
*Seen from the front
Accessories
Accessory Modules Installation Diagram
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
14
Mounting Instructions for the Accessory Modules
Preparing the MCB to connect the Auxiliary Contact, Bell Alarm Contact or Shunt Trip Module
•Useasmallflatscrewdrivertoremovetheclearplasticwindow(A)ontheleftsideoftheMCB(seenfromthefront).Donot
remove the clear plastic window on the right side.
• Use the same screwdriver to remove the solid plastic cover (B) exposing the mechanical trip mechanism (C) beneath the window.
• For the BRxxxUCs only, slide the top and bottom fins forward and remove (D, E).
• For the BRxxxUCs, using small pliers remove the 2 plastic tabs on the fins (G1) and remove the 2 plugs from the breaker (F1) on
the left side only.
- For the SUxxxUCs, using small pliers remove the plugs from the breaker (F1).
- G2 shows the plastic tabs removed and F2 shows the plugs removed.
• For the BRxxxUCs only, reattach the fins after installing the accessory module(s).
Accessory devices are left hand mounted only (seen from the front).
Accessories for Branch and Supplementary Circuit Breakers
Applies to BAU10UC, BAU11UC and BST:
The accessory modules can be installed on the left side only (seen from the front).
Mounting
1. Bring all orange levers of all devices into the “OFF” position
2. Insert guide pin into the lever handle notch (insertion depth approx. 7 mm)
3. Combine MCB and BAU10UC, BAU11UC or BST as outlined on page 14
4. Installation is complete when all snap together
A
D
E
G1 G1
G2
G2
B
C
F1 F1
F2
F2
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
15
Accessories
Busbar and Busbar Accessories
Busbars UL 489 – cuttable
Description
Busbars for the connection of circuit breakers type BRxxxUC to UL 489. The busbars of 1 meter length can individually be cut to a
suitable length for the application and isolated with end caps. Depending on the control cabinet design, the supply is by means of
supply terminals without increasing the installation width or by means of a terminal block directly on the rail without increasing the
installation height.
Three busbar models are available for use with auxiliary contact modules with a width of 9 mm.
Technical Data
Part Number No. of Poles No. of Devices No. of Pins Cross Section Max. Amperage Max. Voltage Pitch
BRBB157 1 57 57
18 mm280 A
1000 V AC/DC
17.6 mm
BRBB256 2 28 56 600 V AC/DC
BRBB357 3 19 57 600 V AC/DC
BRBB137A* 1 37 37 1000 V AC/DC
BRBB246A** 2 23 46 600 V AC/DC
BRBB348A*** 3 16 48 600 V AC/DC
*,**,***See Ordering Data on page 17
Voltage Ratings Single Phase 2 and 3 Phase
Max. AC Voltage 1000 V AC 600 V AC
Max. DC Voltage 1000 V DC 600 V DC
Current Ratings End Feed Center Feed
Max. Current 18 mm2 Cross Section 80 A 160 A†
Protection Class IP20
kA Rating (J Fuse) 14kA
†Note: Two 115 A Feeder Terminals required per phase
How to prepare the cuttable busbar
BR3C20UC
Bottom/Direct
Feeder Terminal
Feeder Terminal
Busbar
Protective Cap
Lock-on, Lock-off Device
Endcap
1. The busbar can be
cut to individually
required lengths for
maximum flexibility
3. Attach an end cap
for maximum
finger safety
2. After cutting, clean
the cut face
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
16
Ordering Data
No. of Poles No. of
Devices
No. of
Pins Description Part Number
1-Pole 12 12 MCB BUS BAR UL489
1 POLE 12 PIN
BRBB112
18 18 MCB BUS BAR UL489
1 POLE 18 PIN
BRBB118
57 57 MCB BUS BAR UL489
1 POLE 57 PIN
BRBB157
2-Pole 6 12 MCB BUS BAR UL489
2 POLE 12 PIN
BRBB212
9 18 MCB BUS BAR UL489
2 POLE 18 PIN
BRBB218
28 56 MCB BUS BAR UL489
2 POLE 56 PIN
BRBB256
3-Pole 4 12 MCB BUS BAR UL489
3 POLE 12 PIN
BRBB312
6 18 MCB BUS BAR UL489
3 POLE 18 PIN
BRBB318
19 57 MCB BUS BAR UL489
3 POLE 57 PIN
BRBB357
*1-Pole with Auxiliary
Module Spacing
37 37 MCB BUS BAR UL489
1 POLE 37 PIN AUX
BRBB137A
**2-Pole with Auxiliary
Module Spacing
23 46 MCB BUS BAR UL489
2 POLE 46 PIN AUX
BRBB246A
***3-Pole with Auxiliary
Module Spacing
16 48 MCB BUS BAR UL489
3 POLE 48 PIN AUX
BRBB348A
Accessories for Busbars UL 489
Description Part Number
Feeder Terminal, UL 489, 115 A BRBBPWR35
Description Part Number
Lock-on, Lock-off Device LD10
Description Part Number
Bottom/Direct Feeder Terminal, UL 489, 115 A BRBBPWR50
Description Part Number
Protective Cap for UL 489 cuttable busbar, 3 caps per bar BRBBPCAP
Description Part Number
Endcap for UL 489 Cuttable Busbar BRBBECAP
Bottom/Direct
Feeder Terminal
Endcap
Protective Cap
Feeder Terminal
Lock-on, Lock-off
Device
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
17
Lock-on, Lock-off Device
Protective Cap
Bottom/Direct
Feeder Terminal
Endcap
Busbar
Feeder Terminal
SU3C20UC
Busbars UL 1077 – cuttable
Description
Busbars for the connection of circuit breakers type SUxxxUC to UL 1077. The busbars of 1 meter length can individually be cut to a
suitable length for the application and isolated with end caps. Depending on the control cabinet design, the supply is by means of
supply terminals without increasing the installation width or by means of a terminal block directly on the rail without increasing the
installation height.
Three busbar models are available for use with auxiliary contact modules with a width of 9 mm.
1. Use a saw to cut the busbar
to the desired length
2. Slide the copper bars
from the insulation and
cut back the bars for proper
end clearances
3. Deburr the edges
4. Use a stiff brush or
compressed air to remove
anycopperorplasticlings
and reassemble the busbar
5. Attach endcaps
Note: For safety purposes,
all shortened busbars
need to be covered with
suitable endcaps
How to prepare the cuttable busbar
Technical Data
Voltage Ratings Single Phase 2 and 3 Phase
Max. AC Voltage 1000 V AC 600 V AC
Max. DC Voltage 1000 V DC 600 V DC
Current Ratings End Feed Center Feed
Max. Current 18 mm2 Cross Section 80 A 160 A†
Protection Class IP20
kA Rating (J Fuse) 14kA
†Note: Two 115 A Feeder Terminals required per phase
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
18
Ordering Data
No. of Poles No. of
Devices
No. of
Pins Description Part
Number
1-Pole 12 12 MCB BUS BAR UL1077
1 POLE 12 PIN
SB112
18 18 MCB BUS BAR UL1077
1 POLE 18 PIN
SB118
57 57 MCB BUS BAR UL1077
1 POLE 57 PIN
SB157
2-Pole 6 12 MCB BUS BAR UL1077
2 POLE 12 PIN
SB212
9 18 MCB BUS BAR UL1077
2 POLE 18 PIN
SB218
28 56 MCB BUS BAR UL1077
2 POLE 56 PIN
SB256
3-Pole 4 12 MCB BUS BAR UL1077
3 POLE 12 PIN
SB312
6 18 MCB BUS BAR UL1077
3 POLE 18 PIN
SB318
19 57 MCB BUS BAR UL1077
3 POLE 57 PIN
SB357
1-Pole with Auxiliary
Module Spacing
37 37 MCB BUS BAR UL1077
1 POLE 37 PIN AUX
SB1A37
2-Pole with Auxiliary
Module Spacing
23 46 MCB BUS BAR UL1077
2 POLE 46 PIN AUX
SB2A46
3-Pole with Auxiliary
Module Spacing
16 48 MCB BUS BAR UL1077
3 POLE 48 PIN AUX
SB3A48
Top Feed Terminal
Description Part Number
MCB BUS BAR UL1077 1P TERM TOP FEED SPF351P
MCBBUSBARUL10772/3PTERMTOPFEED SPF35
Endcap
Description Part Number
MCB BUS BAR UL1077 1P END CAP SEC1P
MCB BUS BAR UL1077 2/3P END CAP SECMP
Bottom/Direct Feeder Terminal
Description Part Number
MCB BUS BAR UL1077 1/2/3P TERM BOT FEED SPF50
Protective Cap
Description Part Number
MCB BUS BAR UL1077 BUS CAP YEL (5 caps) STPC
Lock-on, Lock-off Device
Description Part Number
Lock-on, Lock-off Device LD10
Bottom/Direct
Feeder Terminal
Endcap
Protective Cap
2/3P Top Feed
Terminal
Lock-on, Lock-off
Device
1P Top Feed
Terminal
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
19
Terms
Weidmuller UC Series breakers are UL tested and certified as current limiting protective devices. Current limiting circuit
breakers provide a higher level of circuit protection than a typical zero point external breakers.
Ampere Rating
A rating of the amount of current a protective device will carry
continuously without deteriorating or exceeding temperature
rise limits.
Arc
The effect generated when electrical current bridges the air gap
between two conductors that are not touching.
Branch Circuit
The conductor and components following the last over-current
protective device protecting a load.
Circuit Breaker
A device designed to open and close a circuit by non-automatic
means, and to open the circuit automatically on a pre-determined
overcurrent, without damage to itself when properly applied within
its rating.
Current Limiting
A type of supplementary protector which limits the amount of
damaging short circuit current.
DIN-Rail
A solidly mounted, rail-type device to which any number of circuit
breakers can be mounted.
Double Pole
Term used to describe a breaker that draws power from two poles
of a load center or similar device.
Frame
A component of a miniature circuit breaker. Its primary function is
to provide a rigid, mechanically strong, insulated housing in which
the other components are mounted.
IEC
Abbreviation for International Electrotechnical Commission. This
organization is associated with equipment used internationally.
IEC 60947-2 Current Limiting Circuit Breaker
A circuit breaker with sufficiently short trip time to prevent the
short circuit current from reaching the peak value which would
otherwise be reached.
Interrupting Rating
The highest current, at rated voltage, that a device is intended to
interrupt under standard test conditions.
Let-through Current
The maximum instantaneous or peak current which passes
through a protective device.
Load Center
A device that delivers electricity from a supply source to loads in
light commercial or residential applications.
Miniature Circuit Breaker (MCB)
A specific type of circuit breaker, used to switch and protect
the lowest common distribution voltage in an electrical system.
Generally used in a load center, panelboard or similar device.
NEC
Abbreviation for National Electrical Code. A standard for applying
electrical equipment in the United States.
NEC240.2 Current Limiting
A device that, when interrupting current in its current-limiting
range, reduces the current flowing in the faulted circuit to a
magnitude substantially less than that obtainable in the same
circuit if the device were replaced with a solid conductor having
comparable impedance.
Operating Mechanism
A component of a miniature circuit breaker. Its function is to provide
the means of opening and closing the circuit.
Overcurrent Protective Device
A device such as a circuit breaker or fuse. In the event of an
overload or short circuit, this device will quickly terminate power
to the circuit.
Overload (or Overcurrent)
A condition in which current is in excess of the normal load
being drawn.
Short Circuit
An electrical fault created when two exposed conductors touch.
Single Pole
Term used to describe a breaker that draws power from one pole of
a load center or similar device.
Supplementary Protector
A device similar in function to a miniature circuit breaker, but
not UL approved as a circuit breaker. Used in conjunction with
circuit breakers.
Thermal Magnetic
The predominant trip unit technology used in the domestic market.
A bimetal and an electromagnet work together to provide overload
and short circuit protection.
UL AC 60Hz Cycle
UL defines an AC cycle as the potential energy of the wave form
traveling from Zero-to-Positive amplitude, Positive-to-Zero amplitude,
Zero-to-Negative amplitude, Negative-to-Zero amplitude 60 times in
one second. One cycle is completed every 16.6 milliseconds.
UL Breaker Current Limiting
UL defines breaker current limitation as a breaker that interrupts
and isolates a fault in less than half of an AC cycle. Half a cycle is
completed in 8.3 milliseconds.
Withstand Rating
The maximum current that an unprotected electrical component
can sustain for a specific period of time without the occurrence of
extensive damage.
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
20
Additional Technical Information
Operation and Components of BR/SUxxxUC MCBs
During normal operation and the MCB switch engaged, current flows in the line side terminal to a bimetallic strip, moving
contact, fixed contact, current coil (magnetic trip coil) and out the load side terminal to complete a series path.
The MCB enclosure housing is a molded plastic material. This provides mechanical strength and insulation from the
components inside. The switching system consists of a fixed and a moving contact plate to which incoming and outgoing
conductors are connected. The current carrying components are made up of various metallic compounds depending on the
rating of the circuit breaker.
The orange lever is used to manually engage/disengage the contact under normal ON/OFF conditions, as well as indicate
status of the device. It also allows manual RESET of the latch after an overload or short circuit event.
The thermal overload configuration for the slow rising current over time consists of a strip of bimetal (two dissimilar metals).
The rise in current causes a rise in temperature. The heat generated within the bimetal itself is enough to cause deflection due
to thermal expansion of the dissimilar metals. This deflection further releases the trip latch mechanism and the contact
faces separate.
The magnetic tripping configuration for short circuit conditions consists of a system that allow fast rise time current (too
fast for the bimetal) to separate the contact faces using a spring loaded plunger. The current carrying coil in this trip
configuration moves the plunger when a strong magnetic field produced by the coils releasing the plunger engaging the trip
latch mechanism.
From the action of the fixed and moving contact faces separating in the event of an overload or short circuit situation, an
electric arc in air is formed. The UC Series is designed to handle the arc interruption process where arc energy extraction and
its cooling are provided by the arc runner and parallel arc splitter plates called the arc chute. These plates are held in position by
the housing material. The operating mechanism consists of both magnetic tripping and thermal tripping arrangements.
Magnetic Coil
Load Side Terminal
Plunger
Lever
Manual Switch
Trip Latch
Fixed Contact
Line Side Terminal
Thermal Bimetal
Arc Runner
Moving Contact
Arc Chute
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
21
Weidmuller UC Series Thermal Magnetic Definition
Thermal Overload
A thermal overload is a slow and small overcurrent situation that causes the ampacity and temperature of the circuit to
gradually increase. This type of event is characterized by a slight increase in the load (ampacity) on the circuit and is interrupted
by the thermal trip unit of the breaker.
Thermal Region of the trip curve representing the tripping characteristics of the bimetal trip unit.
The tripping region is sloped due to the gradual overload, heating, and bending nature of the thermal
element over time.
Short Circuit
A short circuit is an intense overcurrent situation that causes the ampacity of the circuit to increase. This type of event is
characterized by a dramatic increase in the load (ampacity) on the circuit and is interrupted by the magnetic trip unit of
the breaker.
Magnetic Region of the trip curve representing the tripping characteristics of the magnetic trip unit.
The tripping region is not sloped due to the instantaneous nature of the magnetic element during a
short circuit.
MCBs’ tripping characteristics are represented graphically in a trip curve chart. The chart shows the response of the thermal
and magnetic trip element to various overload and short circuit situations.
Time/Current Characteristics
10000
1000
100
10
1
0.1
0.01
0.8 12468102040
...times rated current
Trip time in seconds
Thermal
Area either event will trip CB
Magnetic
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
22
Example 1: Thermal Tripping Characteristic
10 Amp B Curve Breaker
Thermal Overload at 20 Amps
To determine the time it takes for the breaker to trip with a
20 A load:
• Find 20 A on the bottom of the curve –10 A breaker
at 2X current is 20 A
• Follow the ampacity line up to the “time” tripping region of
the curve.
The breaker will trip under a thermal overload in the area
between where 20 A intersects the bottom curve line and the
intersection of the top curve. The breaker is guaranteed to trip in
this time bandwidth.
Example 2: Magnetic Tripping Characteristic
10 Amp B Curve Breaker
Short Circuit at 70 Amps
To determine the time it takes for the breaker to trip with a
70 A short circuit:
•Find70Aonthebottomofthecurve–10Abreaker
at 7X current is 70 A
• Notice the “time” at the bottom left corner of the chart axis.
The breaker is guaranteed to trip no later than .01 seconds for
any short circuit equal to 70 A.
Examples of Trip Curve Interpretation
Reading Trip Curves
10000
1000
100
10
1
0,1
0,01
0,8 12468102
04
0
...times rated current
Trip time in seconds
Time Bandwidth
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
10000
1000
100
10
1
0,1
0,01
0,8 12468102
04
0
...times rated current
Trip time in seconds
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
70
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
23
Rated current
IN (A)
Max. operating currents depending on ambient temperature T (A)
-35°C -30°C -25°C -20°C -15°C -10°C -5°C 0°C +5°C +10°C +15°C
1 1.27 1.25 1.23 1.21 1.19 1.17 1.15 1.13 1.10 1.08 1.06
2 2.87 2.81 2.74 2.68 2.62 2.55 2.48 2.42 2.35 2.28 2.20
3 3.89 3.83 3.76 3.70 3.64 3.57 3.50 3.44 3.37 3.30 3.22
4 4.91 4.83 4.76 4.70 4.64 4.57 4.50 4.44 4.37 4.30 4.22
5 6.68 6.56 6.44 6.32 6.19 6.07 5.94 5.81 5.68 5.54 5.40
6 7.70 7.58 7.46 7.34 7.21 7.09 6.96 6.83 6.70 6.56 6.42
7 8.78 8.66 8.54 8.42 8.29 8.17 8.04 7.91 7.78 7.64 7.50
8 9.80 9.68 9.56 9.44 9.31 9.19 9.06 8.93 9.80 8.66 8.52
10 13.89 13.62 13.35 13.07 12.81 12.53 12.23 11.93 11.63 11.33 11.01
12 15.91 15.64 15.37 15.09 14.83 14.55 14.25 13.95 13.65 13.35 13.03
13 16.92 16.65 16.38 16.10 15.84 15.56 15.26 14.96 14.66 14.36 14.04
15 19.77 19.42 19.07 18.74 18.39 18.04 17.69 17.32 16.95 16.57 16.19
16 20.78 20.43 20.08 19.75 19.40 19.05 18.70 18.33 17.96 17.58 17.20
20 25.67 25.28 24.88 24.47 24.06 23.64 23.22 22.78 22.34 21.89 21.43
25 32.21 31.72 31.22 30.70 30.18 29.65 29.10 28.55 27.98 27.41 26.82
30 39.00 38.42 37.78 37.13 36.47 35.80 35.11 34.43 33.71 32.99 32.26
32 41.04 40.46 39.82 39.17 38.51 37.84 37.15 36.47 35.75 35.03 34.30
35 44.08 43.50 42.86 42.21 41.55 40.88 40.19 39.51 38.79 38.07 37.34
40 51.63 50.86 50.04 49.21 48.37 47.51 46.63 45.74 44.83 43.90 42.95
50 64.92 63.97 62.92 61.86 60.77 59.67 58.54 57.40 56.23 55.05 53.81
60 80.45 79.03 77.61 76.16 74.69 73.19 71.67 70.11 68.51 66.88 65.21
63 83.48 82.06 80.71 79.19 77.72 76.22 74.70 73.14 71.54 69.91 68.24
Rated current
IN (A)
Max. operating currents depending on ambient temperature T (A)
+20°C +25°C +30°C +35°C +40°C +45°C +50°C +55°C +60°C +65°C +70°C
1 1.05 1.02 1.00 0.97 0.94 0.91 0.89 0.86 0.83 0.80 0.77
2 2.12 2.04 2.00 1.90 1.82 1.74 1.65 1.56 1.47 1.36 1.25
3 3.14 3.06 3.00 2.92 2.84 2.76 2.67 2.58 2.49 2.38 2.27
4 4.14 4.06 4.00 3.92 3.84 3.76 3.67 3.58 3.49 3.38 3.27
5 5.25 5.12 5.00 4.82 4.66 4.50 4.34 4.17 3.99 3.81 3.62
6 6.27 6.14 6.00 5.84 5.68 5.52 5.36 5.19 5.01 4.83 4.64
7 7.35 7.22 7.00 6.92 6.76 6.60 6.44 6.27 6.09 5.91 5.72
8 8.37 8.24 8.00 7.94 7.78 7.62 7.46 7.29 7.11 6.93 6.74
10 10.67 10.34 10.00 9.63 9.24 8.85 8.45 8.01 7.55 7.06 6.55
12 12.69 12.36 12.00 11.65 11.26 10.60 10.47 10.03 9.57 9.08 8.57
13 13.70 13.37 13.00 12.66 12.27 11.61 11.48 11.04 10.58 10.09 9.58
15 15.79 15.39 15.00 14.54 14.10 13.65 13.19 12.70 12.20 11.69 11.64
16 16.80 16.40 16.00 15.55 15.11 14.66 14.20 13.71 13.21 12.70 12.65
20 20.96 20.47 20.00 19.47 18.95 18.42 17.87 17.30 16.71 16.10 15.47
25 26.22 25.61 25.00 24.33 23.67 23.00 22.28 21.56 20.80 20.02 19.21
30 31.50 30.73 30.00 29.13 28.30 27.44 26.56 25.65 24.71 23.74 22.73
32 33.54 32.77 32.00 31.17 30.34 29.48 28.69 27.69 26.75 25.78 24.77
35 36.58 35.81 35.00 34.21 33.38 32.52 31.64 30.73 29.79 28.82 27.81
40 41.98 40.99 40.00 38.93 37.85 36.75 35.61 34.43 33.21 31.95 30.63
50 52.56 51.28 50.00 47.82 46.24 44.81 43.33 41.81 40.23 38.58 35.77
60 63.50 61.75 60.00 57.08 55.16 53.18 51.13 49.00 46.78 44.47 40.47
63 66.53 64.78 63.00 60.11 58.19 56.21 54.16 52.03 49.81 47.50 43.50
Maximum operating currents depending on ambient temperature
Ambient Temperature Derating
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
24
Thermal Tripping Characteristics Comparison
Example:
10 Amp D Curve Breaker
Thermal Overload at 20 Amps
To determine the time it takes for the breaker to trip with a
20 A load:
•Find20Aonthebottomofthecurve–10Abreaker
at 2X current is 20 A
• Follow the ampacity line up to the “time” tripping region of the
curve.
The breaker will trip under a thermal overload in the area
between where 20 A intersects the bottom curve line (~7.5s)
and the intersection of the top curve (~150s). The breaker is
guaranteed to trip in this time bandwidth.
Similarly the K curve breaker will trip under a thermal overload
between 6 and 350 seconds. The breaker is guaranteed to
not trip before ~6 seconds and will not take longer than ~350
seconds to trip. The breaker may trip at any time in this
time bandwidth.
UC Series D Curve Thermal Magnetic Tripping Characteristics vs K Curve
The K and UC Series D curve breakers are both designed for motor applications where ampacity rises quickly and
momentarily during “start-up”. Both curves can “ride through” the momentary inrush of current and prevent nuisance
tripping while providing protection to the circuit.
Both curves have almost identical tripping characteristics. The magnetic element tripping characteristics are identical
between the two curves and the thermal element tripping characteristics have a slight variation.
D Curve
10000
1000
100
10
1
0,1
0,01
0,8 12468102
04
0
...times rated current
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
Trip time in seconds
Time Bandwidth
K Curve
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
25
Short Circuit Tripping Characteristics Comparison
Example:
10 Amp K Curve Breaker and UC Series 10 Amp
D Curve Breaker
Short Circuit at 100 Amps
Both breakers have an element that will trip between 10 and 14
times rated current. Both breakers will trip under a short circuit
before .01 seconds. And both breakers are guaranteed to trip no
later than .01 seconds for any short circuit equal to 100 A
or greater.
K and UC Series D Curve Summary
Thermal Element Minimum Tripping
The UC Series D curve MCB will interrupt an overload at 2X
rated current in 7.5s or greater. The K curve MCB will interrupt
an overload at 2X rated current in 6 seconds or greater. This
additional time allows a circuit more time to “ride through” high
inrush at start-up and prevent nuisance tripping.
Thermal Element Bandwidth
The K curve tripping bandwidth at 2X rated current is between
6 and 350 seconds. The UC Series D curve tripping bandwidth
at 2X rated current is between 7.5 and 150 seconds. The
differences between the bandwidths demonstrate calibration
and quality control accuracy. The UC Series D curve breaker
from Weidmuller has a much smaller tolerance bandwidth and
requires a higher level of adjustment during manufacturing and
quality control validation.
Magnetic Element
The magnetic element of the K curve and UC Series D curve
MCBs are identical. Both breakers interrupt a short circuit at 10X
the rated current (or greater) in no later than .01 seconds.
K Curve
D Curve
10000
1000
100
10
1
0,1
0,01
0,8 12468102040
...times rated current
Magnetic tripping currents are increased by 30 % on DC supplies.
Ambient temperature 30 °C
Trip time in seconds
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
26
0.8 1234 6810 20 30 50 70 100
0.001
0.01
0.1
1
10
100
1,000
10,000
… times rated current
Trip time in seconds
–30ϒC
+23ϒC
+55ϒC
M1+ 0.05 to 7.5 A
0.8 1234 6810 20 30 50 70 100
0.001
0.01
0.1
1
10
100
1,000
10,000
… times rated current
Trip time in seconds
–30ϒC
+23ϒC
+55ϒC
M1+ 8 to 16 A
Trip Curves
Thermal Magnetic Type
Typical time/current characteristics at 23°C
‡Adapter foot – dimensions in mm (in.)
9102100000
TS32 adapter
20
(.787)
Single Pole Double Pole
†Note: Resistive and inductive loads (0.05 - 16 A)
Additional Weidmuller Offerings
CB4200 Series Circuit Breakers
Thermal Magnetic Type
• Rated from 0.05 to 16.0 amps
•Availableinsingleordoublepolecongurations
• Features a tease free design to reduce contact damage
• Offers push button trip/reset function
• Trip free design means the breaker cannot be held closed
against a fault
• Mounts on 32 mm‡ or 35 mm DIN-rail
• UL 1077 recognized
• CSA C22.2 No. 235
Technical Data
Voltage rating
and current†
UL AC 250 V, DC 65 V, 50/60 Hz
0.05…16 A
CSA AC 250 V, DC 65 V, 50/60 Hz
0.05…16 A
VDE AC 250 V, DC 65 V, 50/60 Hz
0.05…16 A
Creepage resistance PTI 600 to IEC 112
Dielectric strength 4,000 VAC; IEC 664 & 664 A
Insulation resistance > 100 MM (DC 500 V)
Interrupting capacity
(VDE 0660, Part 101, P-2)
4201-10 Maximum
capacity
0.05…0.8 A Self-limiting
1…2 A 200 A
2.5…16 A 400 A
Interrupting capacity
4201 (UL 1077/EN 60934 PC1)
Rated
current
Rated
voltage
Maximum
capacity
0.05…2.0 A AC 250 V 200 A
2.0…16 A AC 250 V 200 A
20 A AC 125 V 400 A
Typical life at 2 x rated current 5,000 operations
Shock 25g (11 ms) to IEC 68-2-27, Test Ea
Torque 1.2 Nm
Vibration 5g (57 to 500 Hz / ±0.38 mm, 10 to 57 Hz) to IEC
68-2-6, Test Fc
Temperature range -30°C…+55°C (-22°F…+131°F)
Corrosion 96 hours at 5% salt spray, to IEC 68-2-11, Test Ka
Humidity 240 hours at 95% RH, to IEC 68-2-3, Test Ca
Weight 60 g per pole
Wire size (UL) #20…8 AWG | solid/0.5…6 mm2
M1+ 0.05 to 7.5 A M1+ 8 to 16 A
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
27
*BDC will accommodate 20 A per pin, 20 A total
** CQB will accommodate 18 A per pin, 18 A total; dedicated
to 4201 Series
*** Please specify horizontal or vertical print when ordering.
Standard quantity = 144 tags per card.
Schematic Diagrams
Schematic Diagrams
Single Pole
Dimensions
Double Pole
Dimensions
Dimensions in mm
Dimensions in mm
Ordering Data
Single Pole Double Pole
Current Ratings
(amps)
Part No. TS 35
‡For TS 32 Rail, see adapter
Part No. TS 35
‡For TS 32 Rail, see adapter
0.05 9124083500 9124223500
0.08 9124653500 9124233500
0.1 9104173500 9120353500
0.2 9104183500 9124243500
0.3 9129813500 9124263500
0.4 9124093500 9124273500
0.5 9101003500 9129583500
0.6 9124113500 9124283500
0.7 9129563500 9124293500
0.8 9101103500 9129593500
1.0 9101203500 9129613500
1.2 9101303500 9129623500
1.3 9124123500 9124313500
1.4 9124133500 9124323500
1.5 9101403500 9129633500
1.8 9124143500 9124333500
2.0 9101503500 9129643500
2.5 9101603500 9129653500
3.0 9101703500 9129663500
3.5 9124163500 9124343500
4.0 9104353500 9129713500
4.5 9124173500 9124353500
5.0 9101803500 9129673500
5.5 9107833500 9124363500
6.0 9103813500 9124373500
6.5 9120043500 9124383500
7.0 9104153500 9124393500
8.0 9103003500 9104673500
9.0 9104613500 9124423500
10.0 9101903500 9129683500
11.0 9124183500 9124433500
12.0 9107843500 9124443500
13.0 9124193500 9124453500
14.0 9107853500 9124463500
15.0 9102003500 9129693500
16.0 9124213500 9124473500
Accessories Type Part No.
Jumpers Daisy Chain 50* BDC 50 9970290000
CQB 2 9970560000
Straight CQB**
insulated
CQB 3 9970570000
CQB 4 9970580000
CQB 10 9970590000
CQB 2 9970600000
Angled CQB**
insulated
CQB 3 9970610000
CQB 4 9970620000
CQB 10 9970630000
Adapter foot (for TS 32 Rail) MCBAF/TS 32 9102100000
Busbar Single pole 1 meter 6720000227
Busbar end cap for 6720000227 6720000225
Power lug for 6720000227 6720000226
Marking Tags Type Part No.
Note: Part numbers are shown
for a single card of pre-printed
tags numbered 1-50.
Special print only WS 8/5 MC 1640750000***
Consecutive horizontal DEK 5/5 0473460001
Consecutive vertical DEK 5/5 0473560001
BR and SU Series| Thermal Magnetic Miniature Circuit Breakers
28
Weidmuller Catalogs at a Glance
Catalog 1:
Modular Terminal Blocks
• P-Series (Push-in)
• I-Series (IDC)
• Power Distribution
Blocks and Fuse Blocks
Catalog 2:
PCB Terminals and Connectors
• Space Saving Technologies
• Wide Variety of Clamping Technologies
• Pitches Ranging from 3.50 mm to 15.00 mm
• OrientationsRangingfrom90˚to270˚
Catalog 3:
RockStar®– Heavy Duty Connectors
• Inserts
• Modular System
• Housings IP65 and IP68
• Cable Glands
Catalog 4.1:
Analog Signal Conditioning
• Intrinsically Safe Conditioners
• Signal Converters and Monitoring Devices
• Indicators and Configurable Displays
• Fieldbus Distribution Boxes
Catalog 4.4:
Surge Protection
• Surge Protection for Low-Voltage
• Surge Protection for Instrumentation and Control
• Surge Protection for Data Interfaces
• Surge Protection for Photovoltaic Systems
Catalog 4.2:
Relays and Optocouplers
• Mechanical Relays
• Solid-State (Opto) Relays
• Power Solid-State Relays
• Multifunction Relays and Timers
Catalog 8:
Sensor Actuator Interface
• SAI Passive Blocks
• SAI Universal
• SAI ASI
• Cables and Connectors
Catalog 9:
Industrial Ethernet
• Unmanaged Switches
• Managed Switches
• Routers
• Media Converters
• SteadyTEC®
• RJ45 Connectors
• Fiber Optic Connectors
• Accessories
• Power Supplies
and Breakers
• Relays and Optos
• Analog Signal
Conditioning
• Wireless and Ethernet
Catalog 7:
Marking Systems
• Terminal Markers
• Wire and Cable Markers
• Device and Equipment Markers
• Printing Systems and Software
Catalog 12:
Wireless I/O and Ethernet Connectivity
• Wireless I/O and Ethernet
• Wireless Gateways
• Wireless Transceivers
• Antennas and Accessories
• Power Feed-in Modules
• Temperature Modules
• Functional Safety Modules
Catalog u-remote:
Distributed I/O Solutions
• Field Bus Couplers
• Digital Input and
Output Modules
• Analog Input and
Output Modules
Catalog 11:
Circuit and Surge Protection
• Surge Protection for Low Voltage
• Surge Protection for Instrumentation and Control
• Circuit Breakers and Protectors
• DIN-mountable AC Receptacles (DRAC)
• Stud Style (Screw clamp)
• Z-Series (Tension clamp)
• W-Series (Screw clamp)
• Multi-function Blocks
Catalog 4.3:
Power Delivery
• Power Supplies
• UPS Control Units
• Battery Back Up Units
Catalog 10:
Short Form Catalog
• Terminal Blocks
• Enclosures and
Cable Glands
• Professional Tools
• Heavy Duty Connectors
Catalog 6:
Tools
• Cutting
• Stripping
• Crimping
• Screwdrivers
•  AutomaticMachines
• Ferrules
Catalog 5:
Enclosures and Cable Glands
• Enclosures
• Cable Glands
• Cabtite (Cable Entry System)
BR/SUxxxUC Series
UL 489 and UL 1077 – AC/DC Rated
Miniature Circuit Breakers
Weidmuller, Canada
10 Spy Court
Markham, Ontario L3R 5H6
Telephone: (800) 268-4080
Facsimile: (877) 300-5635
Email: info1@weidmuller.ca
Website: www.weidmuller.ca
Weidmuller, Mexico
Blvd. Hermanos Serdán 698,
Col. San Rafael Oriente
Puebla, Puebla, Mexico
C.P. 72029
Telephone: 01 222 2686267
Facsimile: 01 222 2686219
Email: clientes@weidmuller.com.mx
Website: www.weidmuller.com.mx
Weidmuller, United States
821 Southlake Blvd.
Richmond, Virginia 23236
Telephone: (800) 849-9343
Facsimile: (804) 379-2593
Email: info@weidmuller.com
Website: www.weidmuller.com
Weidmuller – Your partner in Industrial Connectivity
As experienced experts we support our customers and partners around the world
with products, solutions and services in the industrial environment of power,
signal and data. We are at home in their industries and markets and know the
technological challenges of tomorrow. We are therefore continuously developing
innovative, sustainable and useful solutions for their individual needs. Together we
set standards in Industrial Connectivity.
Visit our BR/SUxxxUC Series Circuit Breakers website page for more information:
www.weidmuller.com/BRSUxxxUCSeries
www.weidmuller.com 06/17 • 3M • LIT1617