Schurter, Inc. •Phone 707-778-6311 • Fax 707- 778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com 193
CIRCUIT BREAKERS FOR EQUIPMENT
1
TM12 Series
• Thermal magnetic release
• Positively trip-free
• Reset or manual
actuation
The TM12 circuit breaker for equipment (CBE) is a single pole, ther-
mal-magnetically operated device providing small size, low cost and
reliable trip-free operation on overloads and shor t circuits within the
maximum breaking capacity. It is intended primarily for the protection
of circuit control functions in sensitive instruments etc. It is not
generally suitable for line protection unless the prospective short cir-
cuit current is less than 200 A at 240 V a.c. (400 A at 28 V d.c.).
Threaded neck and flange mounting types are available each with
optional push on/push off mechanism, shunt terminal and auxiliar y
contact.There is also a choice of screw clamp terminals on cer tain
types.
The well proven mechanism is designed to open the contacts in the
event of over loads. A bimetal strip is heated by the overcurrent and
deflects, thereby releasing the latch mechanism. If the overcurrent is
sufficiently high, the magnetic release will operate and open the
circuit instantaneously.Two characteristics are available.The more
commonly used T characteristic has operating limits between 8-12
times the rated current.The optional F characteristic operates at a
lower current levels of 4-8 times the rated current.
In case of overloads, the contacts will open even if the reset button is
manually held in the closed position.This is known as a trip-free
feature.The contacts open and close with a snap action and the
tripped state is clearly shown by the increased projection of the reset
button. After the opening operation, the reset button has to be fully
depressed, then released, to effect a closing of the contact.
It is impossible to «tease» the contacts by gentle pressure on the
reset button.
Available options
• Fast and slow magnetic tripping characteristics
• Flange type
• Threaded neck type
• Type of actuation: reset or manual ON/OFF (push/push)
• Terminals: quick connect or screw clamp ter minals
• Independent auxiliary contact (change-over contact)
• Shunt terminal
• Setting indication on reset button indicates the position
of the contacts
Special features
• Competitive pricing
• Quick connect terminals
• Choice of mounting styles
• Positively trip-free
• Insensitive to shock or vibration
• UL, CSA, VDE and other approvals
Phone 707-778-6311 • Fax 707-778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com
Schur ter, Inc. •Phone 707-778-6311 • Fax 707-778-6401 • E-mail info@schurter inc.com • Website http://www.schurter inc.com
194
Technical data
Main circuit
Rated voltage Ue See approvals, page 195 AC 240 V; DC 28 V
Rated current InSee approvals, page 195 AC/DC 0,05 – 16 A
Conditional shor t circuit current Inc EN 60 934
PC1, AC 240 V 1000 A
Shor t circuit capacity Icn AC 240 V 200 A
AC/DC 28 V 400 A
Auxiliary circuit
Rated voltage Ue See approvals, page 195 AC 120 V, 240 V; DC 28 V
Rated current InSee approvals, page 195 1,0; 2,0; 3,0 A
Class of protection Between live and accessible par ts II
Other par ts I
Example
Rated current at +23°C 5,0 A
Ambient temperature +50°C
Correction factor 1,2
Chosen rated current at
+50°C ambient temperature
5,0 A x 1,2 = 6,0 A
Tripping characteristics
TMF + TMT
Ambient Correction factor
temperature [°C]
-5 0,87
0 0,90
+10 0,95
+23 1,00
+30 1,05
+40 1,12
+50 1,20
+60 1,30
Effect of ambient
temperature
The unit is calibrated for an ambient tem-
perature of +23°C. To deter mine the rated
current for a lower or higher ambient
temperature, use a correction factor from
the table below:
CIRCUIT BREAKERS FOR EQUIPMENT TM12
1
Rated current
< 7,0 A
≥ 7,0 A
Ambient temp.. +23 °C
60
10
5
1
30
20
10'000
[ sec ][ min ]
Tripping time
Multiple of rated current [ x In
1,05 1085421,32 5020
0,0001
0,001
0,01
0,1
1
10
100
1'000
TMTTMF
Schurter, Inc. •Phone 707-778-6311 • Fax 707- 778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com 195
Approvals
Main circuit Auxiliary circuit
Rated Rated Rated Rated Rated Rated
current range voltage AC voltage DC current voltage AC voltage DC
UL 1077 0,05 – 16 A 240 V 28 V 3 A 28 V
2 A 120 V
CSA C 22,2 0,05 – 16 A 240 V 28 V 1 A 240 V
VDE EN 60934 0,05 – 16 A 240 V 28 V 1 A 240 V 28 V
SEMKO 0,05 – 16 A 240 V 1 A 240 V
NEMKO 0,05 – 16 A 240 V 1 A 240 V
DEMKO 0,05 – 16 A 240 V 1 A 240 V
SEV EN 60934 0,05 – 16 A 240 V 28 V 1 A 240 V 28 V
Technical data (continued)
Degree of protection Accessible range IP40
Ter mination range IP00
Dielectric strength Accessible range AC 4000 V
Insulation resistance DC 500 V >100 MΩ
Endurance Number of cycles at 6 x I n(AC) R-type 40
Number of cycles at I n S-type 5000
Per missible ambient temperature -5°C to +60°C
Vibration resistance IEC 68-2-6, Test Fc, 10 g
1 mm amplitude 5-60 Hz, 60-500 Hz
Shock resistance IEC 68-2-6, Test Ea 100 g
Type of actuation • Reset type R
• Manual ON/OFF (push/push) S
Type of tr ipping • Thermal-magnetic TM
• Positively trip-free
Weight approx. 33 g
CIRCUIT BREAKERS FOR EQUIPMENT TM12
1
Phone 707-778-6311 • Fax 707-778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com
Schur ter, Inc. •Phone 707-778-6311 • Fax 707-778-6401 • E-mail info@schurter inc.com • Website http://www.schurter inc.com
196
Order code
Basic type
TM Single pole thermal magnetic overload protection switch,
positively trip-free
Magnetic release range**
F Fast
T Slow
Mounting style
1Flange type
2 Threaded neck type M10 x 1, with hexagonal- and knurled nut
Actuation type
1Reset type
2 Manual ON/OFF (push/push)
Terminal type
16,3 x 0,8 mm quick connect terminals DIN 46244-A
2 Screw clamp terminals*
* Not available with S-auxiliary contact or N-shunt ter minal
Construction variants *
S Auxiliary contact
N Shunt terminal only for rated currents <7 A
R Setting indication on reset button
* (S; N; R; SN; SR; NR; SNR)
Rated current
0,05 0,1 0,15 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0
1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,3
2,5 2,8 3,0 3,3 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0
7,5 8,0 8,5 9,0 9,5 10 11 12 13 14 15 16
Other rated currents by request
** The magnetic tripping range is valid for AC.For DC the stated magnetic currents are
approx. 1,6 x higher.
Accessories
TZZ 02 Protective cover for threaded neck mounted front side IP54
TM 1 2 – 2 1 1 S N R – – T Z Z 0 2 Order example
0,15F
CIRCUIT BREAKERS FOR EQUIPMENT TM12
1
Schurter, Inc. •Phone 707-778-6311 • Fax 707- 778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com 197
Threaded neck type
11.5
10
Maximum torque 1,5 Nm
1
M 10x1
OFF
36
14.7
18
Ø 5.7
ON
48.5 +0.5
–0.2
2
42±0.2
2
378
4
TMx12-211
8
Label
6.3
14.5
SW 13
42
11.5
6.3
42±0.2
36
TMx12-211N
10
Maximum torque 1,5 Nm
1
M 10x1
OFF
11.6
14.7
18
Ø 5.7
ON
48.5 +0.5
–0.2
2
2
378
4
8.6
14.5
SW 13
42
8
Label
11.5
TMx12-212
10
Maximum torque 1,5 Nm
1
M 10x1
OFF
14.7
18
Ø 5.7
ON
48.5 +0.5
–0.2
42±0.2
2
378
M 4
8
Label
14.5
SW 13
42
16
8.1+0.1
–0.0
16
with without
11
Cut-out
Anti-rotation protection
CIRCUIT BREAKERS FOR EQUIPMENT TM12
1
Schurter, Inc. •Phone 707-778-6311 • Fax 707-778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com
198
Flange type
TMx12-111SN
465
4
1
OFF
36
10.7
13.5 ON
48.5 +0.5
–0.2
2
42±0.2
4
6
50
Ø 5.7
Ø 11.5
2
378
9
8.6
20.22.5
11.5
Label
6.3
8.6
A 6.3
4
11.5
Label
6.3
TMx12-111
1
OFF
36
10.7
13.5 ON
48.5 +0.5
–0.2
2
42±0.2
4
6
50
Ø 5.7
Ø 11.5
2
378
58
Ø 4.5
42±0.2
4
1
OFF
10.7
13.5 ON
48.5 +0.5
–0.2
6
50
Ø 5.7
Ø 11.5
M 4
TMx12-112
11.5
Label
2
378
Cut-out
11
13 13
4.5
30.5
4.5
19.5
Installation from rear
Installation from front
58
Ø 4.5
58
Ø 4.5
12±0.2 12±0.2
12±0.2
12
4.5
42
13
4.5
13
CIRCUIT BREAKERS FOR EQUIPMENT TM12
1
Schurter, Inc. •Phone 707-778-6311 • Fax 707- 778-6401 • E-mail info@schur ter inc.com • Website http://www.schurter inc.com 199
Schematic diagrams – accessories – colors
Schematic diagrams
TM12-... TM12-...N TM12-...S TM12-...SN
Black
Setting display R white
Nickel plated
White label
Black
Nickel plated
Black galvanized
Colors
2
1782
Protective transparent cover
Degree of protection IP54
TZZ02
Accessories
1
2
1
23
4511
266
451
23
I>I>
21
Ø 16
CIRCUIT BREAKERS FOR EQUIPMENT TM12
1
