6
25.0
.984
26.0
1.024

FEATURES

40 A rating at 85

°

C
185

°

F
ISO type terminals
High shock resistance for drop test requirements
(2 meters
6.6 feet
)
Low temperature rise all current carrying material
is copper.
Plug-in and PC board type

SPECIFICATIONS

Contact

(1) Standard type (12V coil voltage)

#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.

Arrangement
1 Form A
1 Form C
High contact capacity
(1 Form A)
Rating
Nominal switching capacity
40 A 14 V DC
N.O.: 40 A 14 V DC
N.C.: 30 A 14 V DC
70 A 14 V DC (at 20

°

C
68

°

F
)
50 A 14 V DC (at 85

°

C
185

°

F
)
Max. switching current
(at 85

°

C
185

°

F
)
N.O.: 40 A 14 V DC
N.O.: 40 A 14 V DC
N.C.: 30 A 14 V DC
N.O.: 40 A 14 V DC
Initial contact resistance
(By voltage drop 6 V DC 1 A)
Max. 15m

Contact material
Silver alloy
Min. switching capacity

#1

1 A 12 V DC (12 V DC), 1 A 24 V DC (24 V DC),
Expected life
Mechanical (at 120 cpm)
Min. 10

6

Electrical (at rated load)
Flux-resistant type: Min. 10

5

*

1

Sealed type: Min. 5

×

10

4

(2) Standard type (24V coil voltage)

*

1

All other specications are the same as those of standard type (12V coil voltage)

Arrangement
1 Form A
1 Form C
High contact capacity
(1 Form A)
Rating
Nominal switching capacity
20 A 28V DC
N.O.: 20 A 28 V DC
N.C.: 10 A 28 V DC
20 A 28V DC
Max. switching current
(at 85

°

C
185

°

F
)
20 A 28 V DC
N.O.: 20 A 28 V DC
N.C.: 10 A 28 V DC
20 A 28 V DC

(3) Heat resistant type (12V, 24V coil voltage)

*

1

All other specications are the same as those of standard type (12V coil voltage)

Type
12V coil voltage
24V coil voltage
Arrangement
1 Form A
1 Form C
1 Form A
1 Form C
Rating
Nominal switching
capacity
40 A 14V DC
N.O.: 40 A 14 V DC
N.C.: 30 A 14 V DC
20 A 28 V DC
N.O.: 20 A 28 V DC
N.C.: 10 A 28 V DC
Max. switching current
(at 85

°

C
185

°

F
)
40 A 14 V DC
N.O.: 40 A 14 V DC
N.C.: 30 A 14 V DC
20 A 28V DC
N.O.: 20 A 28 V DC
N.C.: 10 A 28 V DC

Coil

Arrangement
Coil voltage
Nominal operating power
1 Form A,
1 Form C
12V DC
1.4W
24V DC
1.8W
High contact capacity
(1 Form A)
12V DC
1.8W
24V DC
1.8W
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CB

Characteristics

Remarks

*

1

At nominal switching capacity, operating frequency: 2s ON, 2s OFF
*

2

Measurement at same location as Initial breakdown voltage section
*

3

Detection current: 10 mA
*

4

Excluding contact bounce time
*

5

Time of vibration for each direction; X, Y, Z direction: 4 hours
*

6

Refer to 6. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT

Max. operating speed (at rated load)
15 cpm
Initial insulation resistance*

2

Min. 20 M

(at 500 V DC)
Initial breakdown voltage*

3

Between open contacts
500 Vrms for 1 min.
Between contacts and coil
500 Vrms for 1 min.
Operate time*

4

(at nominal voltage)
Max. 15 ms (Initial)
Release time (without diode)*

4

(at nominal voltage)
Max. 15 ms (Initial)
Shock resistance
Functional
Min. 200 m/s

2

{20 G}
Destructive
Min. 1,000 m/s

2

{100 G}
Vibration resistance
Functional
10 Hz to 500 Hz, Min. 44.1m/s

2

{4.5G}
Functional*

5

10 Hz to 2,000 Hz, Min. 44.1m/s

2

{4.5G}
Conditions for operation, transport and storage*

6

(Not freezing and condensing at low temperature)
Ambient temp.
40

°

C to +85

°

C
40

°

F to +185

°

F
(Heat resistant type: 40

°

C to +125

°

C
40

°

F to +257

°

F
)
Humidity
5% R.H. to 85% R.H.
Mass
Approx. 33 g
1.16 oz
X
Y
Z

TYPICAL APPLICATIONS

Head lights
Starters
ABS
Head Lamp
Air conditioner
Tracter, Combine

ORDERING INFORMATION
1
F
T
M
12 V
CB
Contact arrangement
Protective construction
Mounting classification
Coil voltage (DC)
1a: 1 Form A
1: 1 Form C
1aH: High contact capacity
(1 Form A)
Nil: Sealed type
F: Flux-resistant type
Heat resistant of types
Nil: Standard type
T: Heat resistant type*
1
Nil: Plug-in type
P: PC board type
M: Bracket type
12, 24 V
*1 Heat resistant type with high contact capacity is not available.
(See 2. Heat resistant type in TYPES Page 412)
Note: Bulk pakage: 50 pcs.; Case: 200 pcs.

TYPES

1. Standard type

* High contact capacity PC board type is also available. Please contact us for details.

Contact arrangement
Mounting classication
Coil voltage, V DC
Part No.
Sealed type
Flux-resistant type
1 Form A
PC board type
12V
CB1a-P-12V
CB1aF-P-12V
24V
CB1a-P-24V
CB1aF-P-24V
Plug-in type
12V
CB1a-12V
CB1aF-12V
24V
CB1a-24V
CB1aF-24V
Bracket type
12V
CB1a-M-12V
CB1aF-M-12V
24V
CB1a-M-24V
CB1aF-M-24V
1 Form C
PC board type
12V
CB1-P-12V
CB1F-P-12V
24V
CB1-P-24V
CB1F-P-24V
Plug-in type
12V
CB1-12V
CB1F-12V
24V
CB1-24V
CB1F-24V
Bracket type
12V
CB1-M-12V
CB1F-M-12V
24V
CB1-M-24V
CB1F-M-24V
High contact capacity (1 Form A)
Plug-in type
12V
CB1aH-12V
CB1aHF-12V
24V
CB1aH-24V
CB1aHF-24V
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CB

2. Heat resistant type

COIL DATA

(at 20

°

C
68

°

F
)

* Other pick-up voltage types are also available. Please contact us for details.

Contact arrangement
Mounting classication
Coil voltage, V DC
Part No.
Sealed type
Flux-resistant type
1 Form A
PC board type
12V
CB1a-T-P-12V
CB1aF-T-P-12V
24V
CB1a-T-P-24V
CB1aF-T-P-24V
Plug-in type
12V
CB1a-T-12V
CB1aF-T-12V
24V
CB1a-T-24V
CB1aF-T-24V
Bracket type
12V
CB1a-T-M-12V
CB1aF-T-M-12V
24V
CB1a-T-M-24V
CB1aF-T-M-24V
1 Form C
PC board type
12V
CB1-T-P-12V
CB1F-T-P-12V
24V
CB1-T-P-24V
CB1F-T-P-24V
Plug-in type
12V
CB1-T-12V
CB1F-T-12V
24V
CB1-T-24V
CB1F-T-24V
Bracket type
12V
CB1-T-M-12V
CB1F-T-M-12V
24V
CB1-T-M-24V
CB1F-T-M-24V
Contact
arrangement
Nominal
voltage,
V DC
Pick-up voltage,
V DC*
Drop-out
voltage,
V DC
Nominal
current,
mA
Coil resistance,

Nominal
operating power,
W
Usable voltage
range,
V DC
1 Form A
1 Form C
12
Max. 3 to 7
Min. 1.2 to 4.2
117

±

10%
103

±

10%
1.4
10 to 16
24
Max. 6 to 14
Min. 2.4 to 8.4
75

±

10%
320

±

10%
1.8
20 to 32
High contact
capacity
(1 Form A)
12
Max. 3 to 7
Min. 1.2 to 4.2
150

±

10%
80

±

10%
1.8
10 to 16

DIMENSIONS

1. PC board type

mm
inch
22.0
.866
26.0
1.024
2.15
.085
6.3
.248
4.5
.177
1.0
.039
25.0
.984
0.8
.031
8.4
.331
16.8
.661
2.6
.102
17.9
.705
8
.315
8.4
.331
86
87a
87
30
85

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
87
87a
85
86
1a
1c
87
85

2. Plug-in type
25.0
.984
11.0
.433
5-6.3
5-.248
26.0
1.024
22.0
.866
4.0
.157
1.7 dia.
.067 dia.
0.8
.031
8.4
.331
16.8
.661
2.6
.102
17.9
.705
8
.315
8.4
.331
86
87a
87
30
85

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
87
87a
85
86
1a
1c
87
85
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CB

3. Bracket type

mm
inch
16.0
.630
6.0
.236
25.0
.984
16.0
.630
4.0
±0.1
.157
±.004
1.7
.067
5.4
±0.1 dia.
.213
±.004
22.0
.866
11.0
.433
5-6.3
5-.248
26.0
1.024
4.0
.157
1.7 dia.
.067 dia.
8
.315
17.9
.705
0.8
.031
8.4
.331
2.6
.102
8.4
.331
16.8
.661
86
87
a*
87
30
85

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
87
87a
85
86
1a
1c
87
85

4. High contact capacity type (Plug-in terminal type)
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
.661
8.4
.331
2.6
.102
0.8
.031
1.2
.047
8.4
.331
17.9
.705
22.0
.866
26.5
1.043
11.0
.433
15.0
.591
25.5
1.004
4.0
.157
5.8
.228

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)
87
85
30
86

High contact capacity type (PC board terminal type)
Coming Soon
A*
Sealed by epoxy resin
9.5
.374
9.5
.374
1.0
.039
1.0
.039
1.0
.039
4.5
.177
3-1.7
3-.067
3-1.7
3-.067
6.3
.248
2-2.15
2-.085
7
8
5
8
0
3
6
8
2-0.8
2-.031
2-1.2
2-.047
16.8
.661
8.4
.331
4.5
.177
5.3
.209
5.3
.209
3.9
.154
3.9
.154
3.9
.154
3.9
.154
2.6
.102
8.4
.331
17.9
.705
22.0
.866
26.5
1.043
25.5
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)
87
85
30
86
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CB


REFERENCE DATA

CB (Standard type)
1. Coil temperature rise
Sample: CB1aF-P-12V, 3pcs.
Measured potion: Inside the coil
Contact carrying current: 40A
Ambient temperature: 85
°C
185
°F
2. Max. switching capability (Resistive load)
(Standard type)
3. Ambient temperature and operating
temperature range
(Standard type)
Coil applied voltage, V
Temperature rise,
°
C
12
14
16
180
150
120
90
60
30
0
40A
0
Switching current, A
Switching voltage, VDC
10
50
40
30
20
60
0
20
30
40
10
50
10
5
cycle line
Actual value
(Max. 10
5
cycle)
(N.O. side Room temperature)
0
Ambient temperature,
°C
Coil applied voltage, VDC
5
10
15
35
30
25
20
40
40 20
20
40
60
100
0
120
8085
Pick-up voltage
(Cold start)
4. Distribution of pick-up and drop-out voltage
Sample: CB1-P-12V, 42pcs.
5. Distribution of operate and release time
Sample: CB1-P-24V, 42pcs.
* Wi