CB
ORDERING INFORMATION
AUTOMOTIVE RELAY
WITH ISO TERMINAL
ARRANGEMENT CB RELAYS
RoHS Directive compatibility information
http://www.mew.co.jp/ac/e/environment/
FEATURES
1. This relay has an ISO (International
Organization for Standardization)
terminal arrangement.
Te r minals are all solder plated.
*35 A type: Terminal is the plug-in type
(no plating).
2. Relay is compact and high capacity
(40 A).
Compact form factor realized with space
saving 22 × 26 mm .866 × 1.024 inch
small base area thanks to integrated
bobbin and base construction. Features
high switching capacity of 40 A
3. Features high thermal resistance of
125°C 257°F (heat resistant type).
Heat resistant type is available that can
withstand use near engines. (40 A
switching capacity)
4. Sealed type available for resisting
adverse environments.
5. Surge absorbing built-in diode type
that works when the relay coil is off
and an internal resistor type are
available. (Please inquire.)
6. Protective element type is also
available.
7. For only plug-in types, types with
nominal switching capacities of 35 A
(12 V) and 15 A (24 V) are available.
TYPICAL APPLICATIONS
1. Automobiles
Headlights, Cell motors, Air conditioners,
ABS, EPS, etc.
2. Construction equipment
3. Agricultural equipment, Conveyor,
etc.
Contact arrangement
1a:
1:
1 Form A
1 Form C
CB
Protective construction
Nil:
F:
Sealed type
Flux-resistant type
Heat resistant of types
Nil:
T:
Standard type
Heat resistant type
Mounting classification
Nil:
P:
M:
Coil voltage (DC)
12V, 24 V
Plug-in type
PC board type
Bracket type
Protective element
Nil:
D:
R:
None
with diode inside
with resistor inside
Contact rating
Nil:
H:
V:
Standard type
High contact capacity type
35 A type
CB
TYPES
1. Standard type
Packing quantity; Carton: 50 pcs. Case: 200 pcs.
Notes: 1. Please use “CB∗∗∗R∗∗” to order built-in resistor type and “CB∗∗∗D∗∗” to order built-in diode type. (Asterisks “∗” should be filled in from parts table.)
2. *Regarding solder, this product is not MIL (Military Standard) compliant. Please evaluate solder mounting by the actual equipment before using.
2. Heat resistant type
Packing quantity; Carton: 50 pcs. Case: 200 pcs.
Notes: 1. Please use “CB∗∗∗R∗∗” to order built-in resistor type and “CB∗∗∗D∗∗” to order built-in diode type. (Asterisks “∗” should be filled in from parts table.)
2. *Regarding solder, this product is not MIL (Military Standard) compliant. Please evaluate solder mounting by the actual equipment before using.
3. 35 A type (*Terminals are all of the plug-in type.)
Packing quantity; Carton: 50 pcs. Case: 200 pcs.
Contact arrangement Mounting classification Nominal coil voltage Sealed type Flux-resistant type
Part No. Part No.
1 Form A
PC board type 12V DC CB1a-P-12V CB1aF-P-12V
24V DC CB1a-P-24V CB1aF-P-24V
Plug-in type 12V DC CB1a-12V CB1aF-12V
24V DC CB1a-24V CB1aF-24V
Bracket type 12V DC CB1a-M-12V CB1aF-M-12V
24V DC CB1a-M-24V CB1aF-M-24V
1 Form C
PC board type 12V DC CB1-P-12V CB1F-P-12V
24V DC CB1-P-24V CB1F-P-24V
Plug-in type 12V DC CB1-12V CB1F-12V
24V DC CB1-24V CB1F-24V
Bracket type 12V DC CB1-M-12V CB1F-M-12V
24V DC CB1-M-24V CB1F-M-24V
High contact capacity
(1 Form A)
PC board type* 12V DC CB1aH-P-12V CB1aHF-P-12V
24V DC CB1aH-P-24V CB1aHF-P-24V
Plug-in type 12V DC CB1aH-12V CB1aHF-12V
24V DC CB1aH-24V CB1aHF-24V
Bracket type 12V DC CB1aH-M-12V CB1aHF-M-12V
24V DC CB1aH-M-24V CB1aHF-M-24V
Contact arrangement Mounting classification Nominal coil voltage Sealed type Flux-resistant type
Part No. Part No.
1 Form A
PC board type 12V DC CB1a-T-P-12V CB1aF-T-P-12V
24V DC CB1a-T-P-24V CB1aF-T-P-24V
Plug-in type 12V DC CB1a-T-12V CB1aF-T-12V
24V DC CB1a-T-24V CB1aF-T-24V
Bracket type 12V DC CB1a-T-M-12V CB1aF-T-M-12V
24V DC CB1a-T-M-24V CB1aF-T-M-24V
1 Form C
PC board type 12V DC CB1-T-P-12V CB1F-T-P-12V
24V DC CB1-T-P-24V CB1F-T-P-24V
Plug-in type 12V DC CB1-T-12V CB1F-T-12V
24V DC CB1-T-24V CB1F-T-24V
Bracket type 12V DC CB1-T-M-12V CB1F-T-M-12V
24V DC CB1-T-M-24V CB1F-T-M-24V
High contact capacity
(1 Form A)
PC board type* 12V DC CB1aH-T-P-12V CB1aHF-T-P-12V
24V DC CB1aH-T-P-24V CB1aHF-T-P-24V
Plug-in type 12V DC CB1aH-T-12V CB1aHF-T-12V
24V DC CB1aH-T-24V CB1aHF-T-24V
Bracket type 12V DC CB1aH-T-M-12V CB1aHF-T-M-12V
24V DC CB1aH-T-M-24V CB1aHF-T-M-24V
Contact arrangement Nominal coil voltage Sealed type Flux-resistant type
Part No. Part No.
1 Form A 12V DC CB1aV-12V CB1aVF-12V
24V DC CB1aV-24V CB1aVF-24V
1 Form C 12V DC CB1V-12V CB1VF-12V
24V DC CB1V-24V CB1VF-24V
1 Form A with resistor inside 12V DC CB1aV-R-12V CB1aVF-R-12V
24V DC CB1aV-R-24V CB1aVF-R-24V
1 Form C with resistor inside 12V DC CB1V-R-12V CB1VF-R-12V
24V DC CB1V-R-24V CB1VF-R-24V
1 Form A with diode inside 12V DC CB1aV-D-12V CB1aVF-D-12V
24V DC CB1aV-D-24V CB1aVF-D-24V
1 Form C with diode inside 12V DC CB1V-D-12V CB1VF-D-12V
24V DC CB1V-D-24V CB1VF-D-24V
CB
RATING
1. Coil data
1) 1. No protective element and with diode inside
Note: Other pick-up voltage types are also available. Please contact us for details.
2) With resistor inside
2. Specifications
1) Standard type (12 V coil voltage)
Notes: *1. This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the
actual load.
*2. The upper operation ambient temperature limit is the maximum temperature that can satisfy the coil temperature rise value. Refer to Conditions for operation,
transport and storage mentioned in AMBIENT ENVIRONMENT.
2) Standard type (24 V coil voltage)
Note: All other specifications are the same as those of standard type (12 V coil voltage)
Contact
arrangement
Nominal coil
voltage
Pick-up voltage
(Initial, at 20°C 68°F)
Drop-out voltage
(Initial, at 20°C 68°F)
Nominal operating
current
(at 20°C 68°F)
Coil resistance
(±10%)
(at 20°C 68°F)
Nominal operating
power
(at 20°C 68°F)
Usable voltage
range
1 Form A,
1 Form C
12V DC 3 to 7V DC 1.2 to 4.2V DC 117mA 103Ω1.4W 10 to 16V DC
24V DC 6 to 14V DC 2.4 to 8.4V DC 75mA 320Ω1.8W 20 to 32V DC
High contact
capacity
(1 Form A)
12V DC 3 to 7V DC 1.2 to 4.2V DC 117mA 103Ω1.4W (PC board type) 10 to 16V DC
150mA 80Ω1.8W
24V DC 6 to 14V DC 2.4 to 8.4V DC 58mA 411Ω1.4W (PC board type) 20 to 32V DC
75mA 320Ω1.8W
Contact
arrangement
Nominal coil
voltage
Pick-up voltage
(Initial, at 20°C 68°F)
Drop-out voltage
(Initial, at 20°C 68°F)
Nominal operating
current
(at 20°C 68°F)
Combined resistance
(±10%)
(at 20°C 68°F)
Nominal operating
power
(at 20°C 68°F)
Usable voltage
range
1 Form A,
1 Form C
12V DC 3 to 7V DC 1.2 to 4.2V DC 134mA 89.5Ω1.6W 10 to 16V DC
24V DC 6 to 14V DC 2.4 to 8.4V DC 84mA 287.2Ω2.0W 20 to 32V DC
Characteristics Item Specifications
Contact
Arrangement 1 Form A 1 Form C High contact capacity
(1 Form A)
Contact resistance (Initial) Typ2mΩ (By voltage drop 6 V DC 1 A)
Contact material Ag alloy (Cadmium free)
Rating
Nominal switching capacity (Initial) 40A 14V DC N.O.: 40A 14V DC
N.C.: 30A 14V DC
70A 14V DC (at 20°C 68°F)
50A 14V DC (at 85°C 185°F)
Max. carrying current (Initial)
(14V DC, at 85°C 185°F, continuous) N.O.: 40A N.O.: 40A, N.C.: 30A N.O.: 40A
Nominal operating power 1.4W 1.4W 1.8W (1.4W: PC board type)
Min. switching capacity*11A 12V DC (12V DC), 1A 24V DC (24V DC)
Electrical
characteristics
Initial insulation resistance Min. 20 MΩ (at 500 V DC)
Initial breakdown
voltage
Between open contacts 500 Vrms for 1 min. (Detection current: 10mA)
Between contacts and coil 500 Vrms for 1 min. (Detection current: 10mA)
Operate time (at nominal voltage)
(at 20°C 68°F)Max. 15ms (at 20°C 68°F, excluding contact bounce time) (Initial)
Release time (at nominal voltage)
(at 20°C 68°F)Max. 15ms (at 20°C 68°F, excluding contact bounce time, without diode) (Initial)
Mechanical
characteristics
Shock resistance Functional Min. 200 m/s2 {20G}
Destructive Min. 1,000 m/s2 {100G}
Vibration
resistance
Functional 10 Hz to 500 Hz, Min. 44.1m/s2 {4.5G}
Destructive 10 Hz to 2,000 Hz, Min. 44.1m/s2 {4.5G} Time of vibration for each direction; X. Y. Z direction: 4 hours
Expected life Electrical (at nominal switching capacity) Flux-resistant type: Min. 105, Sealed type: Min. 5×104 (Operating frequency: 2s ON, 2s OFF)
Mechanical Min. 106 (at 120 cpm)
Conditions
Conditions for operation, transport and
storage*2
Standard type; Ambient temp: –40 to +85°C –40 to +185°F,
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Heat resistant type; Ambient temp: –40 to +125°C –40 to +257°F,
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed 15 cpm (At nominal switching capacity)
Unit weight Approx. 33 g 1.16 oz
Characteristics Item Specifications
Contact
Arrangement 1 Form A 1 Form C High contact capacity
(1 Form A)
Contact resistance (Initial) Max. 15mΩ (By voltage drop 6 V DC 1 A)
Contact material Ag alloy (Cadmium free)
Rating
Nominal switching capacity (Initial) 20A 28V DC N.O.: 20A 28V DC
N.C.: 10A 28V DC 20A 28V DC
Max. carrying current (Initial)
(28V DC, at 85°C 185°F, continuous) 20A N.O.: 20A, N.C.: 10A 20A
Nominal operating power 1.8W 1.8W 1.8W, 1.4W (PC board type)
CB
3) Heat resistant type (12 V and 24 V coil voltage)
Notes: 1. All other specifications are the same as those of standard type (12 V coil voltage)
2. *Current value in which carry current is possible when the coil temperature is 180°C 356°F
4) 35 A type (12 V coil voltage)
Note: * This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual
load.
5) 35 A type (24 V coil voltage)
Note: All other specifications are the same as those of 35 A type (12 V coil voltage).
Characteristics Item Specifications
12V 24V
Contact
Arrangement 1 Form A 1 Form C
High contact
capacity
(1 Form A)
1 Form A 1 Form C
High contact
capacity
(1 Form A)
Contact resistance (Initial) Max. 15mΩ (By voltage drop 6 V DC 1 A)
Contact material Ag alloy (Cadmium free)
Rating
Nominal switching capacity
(Initial) 40A 14V DC N.O.: 40A 14V DC
N.C.: 30A 14V DC 40A 14V DC 20A 28V DC N.O.: 20A 28V DC
N.C.: 10A 28V DC 20A 28V DC
Max. carrying current (Initial)
(at 85°C 185°F, continuous)* 50A 14V DC N.O.: 50A 14V DC
N.C.: 30A 14V DC
45A
14V DC
50A
14V DC 25A 28V DC N.O.: 25A 28V DC
N.C.: 10A 28V DC 25A 28V DC
Nominal operating power 1.4W 1.4W 1.8W
1.4W
(PC board
type)
1.8W 1.8W
1.8W,
1.4W
(PC board type)
Characteristics Item Specifications
Contact
Arrangement 1 Form A 1 Form C
Contact resistance (Initial) Typ2mΩ (By voltage drop 6 V DC 1 A)
Contact material Ag alloy (Cadmium free)
Rating
Nominal switching capacity (Resistive load) 35A 14V DC N.O.: 35A 14V DC, N.C.: 25A 14V DC
Max. carrying current (Initial)
(14V DC, at 85°C 185°F, continuous) N.O.: 35A N.O.: 35A, N.C.: 25A
Nominal operating power 1.4W, 1.6W (with resistor inside)
Min. switching capacity (Reference value)* 1A 12V DC (12V DC), 1A 24V DC (24V DC)
Electrical
characteristics
Initial insulation resistance Min. 20 MΩ (at 500 V DC)
Initial breakdown
voltage
Between open contacts 500 Vrms for 1 min. (Detection current: 10mA)
Between contacts and coil 500 Vrms for 1 min. (Detection current: 10mA)
Operate time (at nominal voltage) Max. 15ms (excluding contact bounce time) (Initial)
Release time (at nominal voltage) Max. 15ms (excluding contact bounce time, without diode) (Initial)
Mechanical
characteristics
Shock resistance Functional Min. 100 m/s2 {10G} (Half-wave pulse of sine wave: 11ms; detection: 10µs)
Destructive Min. 1,000 m/s2 {100G} (Half-wave pulse of sine wave: 6ms)
Vibration
resistance
Functional 10 Hz to 100 Hz, Min. 44.1m/s2 {4.5G} (Detection time: 10µs)
Destructive 10 Hz to 2,000 Hz, Min. 44.1m/s2 {4.5G} Time of vibration for each direction; X. Y. Z direction: 4 hours
Expected life Electrical (at nominal switching capacity) Flux-resistant type: Min. 105, Sealed type: Min. 5×104 (Operating frequency: 2s ON, 2s OFF)
With diode inside: Min. 5×104 (Operating frequency: 2s ON, 2s OFF)
Mechanical Min. 106 (at 120 cpm)
Conditions Conditions for operation, transport and storage Ambient temp: –40°C to +85°C –40°F to +185°F
Humidity: 5% R.H. to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed 15 cpm (At nominal switching capacity)
Unit weight Approx. 26 g .92 oz, Approx. 28 g .99 oz (with diode inside)
Characteristics Item Specifications
Contact Arrangement 1 Form A 1 Form C
Rating
Nominal switching capacity (Resistive load) 15A 28V DC N.O.: 15A 28V DC, N.C.: 25A 14V DC
Max. carrying current
(14V DC, at 85°C 185°F, continuous) N.O.: 15A N.O.: 15A, N.C.: 8A
Nominal operating power 1.8W, 2.0W (with resistor inside)
CB
DIMENSIONS (Unit: mm inch)
1. PC board type
External dimensions
22.0
26.0
2.15
6.3
4.5
1.0
25.0
0.8
8.4
16.8
2.6
17.9
8
8.4
86 87a
87
30
85
.331
.031
.661
.102
.705
.315
.331
.866
.248
.177
.039
1.024
.085
.984
Dimension: General tolerance
Max. 1mm .039 inch:±0.1 ±.004
1 to 3mm .039 to .118 inch:±0.2 ±.008
Min. 3mm .118 inch:±0.3 ±.012
Schematic (Bottom view)
PC board pattern (Bottom view)
86
30
85 87
86
30
85 87
87a
1 Form A
1 Form C
Including diode type,
including resistor type also available
Including diode type,
including resistor type also available
1 Form C type only
1 Form C type only
4(or5)-2.6
30
87a
87
85
86 8.4
16.8
4(or5)-1.4
17.9
8.4
8.0
.331
.661
.705
.331
.315
4(or5)-.102
4(or5)-.055
2. Plug-in type * The dimensions are the same as those of 35A type.
External dimensions
25.0
11.0
5-6.3
26.0
22.0
4.0
1.7 dia.
0.8
8.4
16.8
2.6
17.9
8
8.4
86 87a
87
30
85
.984
.433
5-.248
1.024
.866
.157
.067 dia.
.031
.331
.661
.102
.705
.315
.331
Dimension: General tolerance
Max. 1mm .039 inch:±0.1 ±.004
1 to 3mm .039 to .118 inch:±0.2 ±.008
Min. 3mm .118 inch:±0.3 ±.012
Schematic (Bottom view)
86
30
85 87
86
30
85 87
87a
1 Form A
1 Form C
Including diode type,
including resistor type also available
Including diode type,
including resistor type also available
CB
3. Bracket type
External dimensions
16.0
6.0
25.0
16.0
4.0±0.1
1.7
5.4±0.1 dia.
22.0
11.0
5-6.3
26.0
4.0
1.7 dia.
8
17.9
0.8
8.4
2.6
8.4
16.8
86 87a*
87
30
85
.315
.705
.031
.331
.102
.331
.661
.630
.236
.984
.630 .067
.866
.433
5-.248
1.024
.157
.067 dia.
.157±.004
.213±.004
Dimension: General tolerance
Max. 1mm .039 inch:±0.1 ±.004
1 to 3mm .039 to .118 inch:±0.2 ±.008
Min. 3mm .118 inch:±0.3 ±.012
Schematic (Bottom view)
86
30
85 87
86
30
85 87
87a
1 Form A
1 Form C
Including diode type,
including resistor type also available
Including diode type,
including resistor type also available
4. High contact capacity (1 Form A) (Plug-in type)
External dimensions
2-6.3±0.08
2-.248±.003
4-1.7 dia. hole
4-.067 dia. hole
2-9.5±0.08
2-.374±.003
87
30
85
86
16.8
8.4
2.6
0.8
1.2
8.4
17.9
22.026.5
11.0
15.0
25.5
4.0
5.8
.661
.331
.102
.031
.047
.705
.8661.043
.433
.591
1.004
.157
.228
.331
Dimension: General tolerance
Max. 1mm .039 inch:±0.1 ±.004
1 to 3mm .039 to .118 inch:±0.2 ±.008
Min. 3mm .118 inch:±0.3 ±.012
Schematic (Bottom view)
86
30
85 87
Including diode type,
including resistor type also available
CB
Cautions regarding the protection element
For Cautions for Use, see Relay Technical Information.
5. High contact capacity (1 Form A) (PC board type)
External dimensions
A*
Sealed by epoxy resin
9.5
9.5
1.0
1.0
1.0 4.5
3-1.7
3-1.7
6.3
2-2.15
78
58
03
68
2-0.8
2-1.2 16.8
8.4
4.5
5.35.3
3.9
3.9 3.9
3.9
2.6
8.4
17.9
22.0
26.5
25.5
.331
2-.031
2-.047 .661
.331
.154
.154 .154
.154
.102
.705
.177
.209
.866
.374
.039
3-.067
.374
.039
.039 .177
3-.067
.248
2-.085
.209
1.043
1.004
Dimension: General tolerance
Max. 1mm .039 inch:±0.1 ±.004
1 to 3mm .039 to .118 inch:±0.2 ±.008
Min. 3mm .118 inch:±0.3 ±.012
* Intervals between terminals is measured at A surface level.
Schematic (Bottom view)
PC board pattern (Bottom view)
87
85
30
86
Including diode type,
including resistor type also available
30 87
85
86
2.6
1.4
3-1.8
3-1.8
3-2.15
3-2.15
16.8
8.4
7.8
8.4
17.9
7.8
.102
.055
3-.071
3-.071
3-.085
3-.085
.661
.331
.307
.331
.705
.307
1. Part numbers without protection
elements
1) 12 V models
When connecting a coil surge protection
circuit to these relays, we recommend a
zener diode with a zener voltage of 24 V
or higher, or a resistor (680Ω to 1,000Ω).
When a diode is connected to the coil in
parallel, the release time will slow down
and working life may shorten. Before use,
please check the circuit and verify that
the diode is not connected in parallel to
the coil drive circuit.
2) 24 V models
When connecting a coil surge protection
circuit to these relays, we recommend a
zener diode with a zener voltage of 48 V
or higher, or a resistor (2,800Ω to
4,700Ω).
When a diode is connected to the coil in
parallel, the release time will slow down
and working life may shorten. Before use,
please check the circuit and verify that
the diode is not connected in parallel to
the coil drive circuit.
2. Part numbers with diodes
These relays use a diode in the coil surge
protection element. Therefore, the
release time is slower and the working life
might be shorter compared to part
numbers without protection elements and
part numbers with resistors.
Be sure to use only after evaluating under
actual load conditions.
3. Part numbers with resistors
This part number employs a resistor in
the coil surge protection circuit; therefore,
an external surge protection element is
not required. In particular, when a diode
is connected in parallel with a coil, the
release time becomes slower which
could adversely affect working life.
Please check the circuit and make sure
that a diode is not connected in parallel
with the coil drive circuit.
