CA
AUTOMOTIVE POWER
RELAYS — SMALL SIZE,
LIGHT WEIGHT
CA RELAYS
FEATURES
TYPICAL APPLICATIONS
• Small size and light weight
For space saving, the outside dimensions
of the main body are reduced to be 21.5
mm (length) 14.4 mm (width) 37 mm
(height) (.846 .567 1.457 inch) and
the weight is also reduced to be approx.
19 g .67 oz (direct coupling 1 Form A, 1
Form B type)
• Low operating power (1.4W) type is
available (1 Form A, 1 Form B)
• Since the terminal arrangement
complies with JIS D5011 B4-M1,
commercial connectors are available
for these types of relays.
• Superior inrush characteristics
Despite its small size, 120A (max. 0.1 s)
capacity has been achieved by using
contacts that are good at withstanding
inrush currents and because of an
ingenious contacting mechanism.
(1 Form A and 1 Form B)
• Motorcycles and automobiles
Motorcycle cell motors, car air
conditioners, halogen lamps, etc.
• Agricultural equipment
• Battery equipped devices such as
conveyance vehicles
ORDERING INFORMATION
CA
Contact arrangement
1a: 1 Form A
1b: 1 Form B
1: 1 Form C
Protective construction
Nil: Sealed type
F: Dust cover type
Nominal operating power
Nil: Standard type (1.8 W)
S: Low operating power type (1.4 W) (1 Form A, 1 Form B)
Protective element
Nil: None (Standard type)
R: With resistor inside
Coil voltage (DC)
12 V, 24 V (1 Form C only)
Mounting method
A: Rubber bracket A type (1 Form A, 1 Form B)
N: Screw mounting type
C: Direct coupling type
Classification by type
Nil: 1 Form C
5: 1 Form A or 1 Form B
ds_61201_en_ca: 010113J
1
CA
TYPES
Standard type
Contact arrangement
Coil voltage
Mounting type
Rubber bracket A
1 Form A
1 Form B
12 V DC
12 V DC
12 V DC
1 Form C
24 V DC
Low operating power type
Sealed type
Dust cover type
Sealed type
Part No.
Part No.
Part No.
Dust cover type
Part No.
CA1a-12V-A-5
CA1aF-12V-A-5
CA1aS-12V-A-5
CA1aFS-12V-A-5
Screw-mounting
CA1a-12V-N-5
CA1aF-12V-N-5
CA1aS-12V-N-5
CA1aFS-12V-N-5
Direct coupling
CA1a-12V-C-5
CA1aF-12V-C-5
CA1aS-12V-C-5
CA1aFS-12V-C-5
Rubber bracket A
CA1b-12V-A-5
CA1bF-12V-A-5
CA1bS-12V-A-5
CA1bFS-12V-A-5
Screw-mounting
CA1b-12V-N-5
CA1bF-12V-N-5
CA1bS-12V-N-5
CA1bFS-12V-N-5
Direct coupling
CA1bFS-12V-C-5
CA1b-12V-C-5
CA1bF-12V-C-5
CA1bS-12V-C-5
Screw-mounting
CA1-12V-N
–
–
–
Direct coupling
CA1-12V-C
–
–
–
Screw-mounting
CA1-24V-N
–
–
–
Direct coupling
CA1-24V-C
–
–
–
Standard packing: Carton: 20 pcs. Case: 200 pcs.
Note: Please use “CAR--- or CASR---” with resistor inside type. (Asterisks “ ” should be filled in from ORDERING INFORMATION.)
RATING
1. Coil data
Nominal coil
voltage
Pick-up voltage
(at 20C 68F)
Drop-out
voltage
(at 20C 68F)
Nominal operating
current
[10%] (at 20C 68F)
Coil resistance
[10%] (at 20C 68F)
Nominal
operating power
Usable voltage
range
Standard type
1 Form A and 1 Form B
12 V DC
Max. 8 V DC
0.6 to 6 V DC
150 mA
80
1.8 W
10 to 16V DC
Low operating power type
1 Form A and 1 Form B
12 V DC
Max. 8 V DC
0.6 to 6 V DC
120 mA
100
1.4 W
10 to 16V DC
12 V DC
Max. 8 V DC
Min. 0.6 V DC
150 mA
80
1.8 W
10 to 15V DC
24 V DC
Max. 16 V DC
Min. 1.2 V DC
75 mA
320
1.8 W
20 to 30V DC
1 Form C
Note: Other pick-up voltage types are also available. Please contact us for details.
2
ds_61201_en_ca: 010113J
CA
2. Specifications
1) 12 V DC type
Characteristics
Item
Arrangement
Specifications
1 Form A type
1 Form B type
1 Form C type
1 Form A
1 Form B
1 Form C
Contact resistance (Initial)
Contact
Contact voltage drop (after electrical life test)
Typ 3m (By voltage drop 6V DC 1A)
Max. 0.3 V
[by voltage drop
12 V DC 20 A (1.4 W type),
12 V DC 30 A (1.8 W type)]
Contact material
Rating
Max. 0.3 V
(by voltage drop
12 V DC 20 A)
Ag alloy (Cadmium free)
Nominal switching capacity (resistive load)
20 A 12V DC (1.4 W type)
30 A 12V DC (1.8 W type)
Max. carrying current
(at coil applied voltage 14 V DC, 80C 176F)
20 A continuous (1.4 W type)
30 A for 1 min. (1.8 W type)
Nominal operating power
Insulation resistance (Initial)
Breakdown
voltage (Initial)
Vibration
resistance
Expected life
Max. 10ms (at nominal voltage) (excluding contact bounce time) (Initial)
Max. 10ms (at nominal voltage) (excluding contact bounce time) (Initial)
Min. 200 m/s2 {20G}
(Half-wave pulse of sine wave: 11ms;
detection time: 10s)
Min. 100 m/s2 {10G}
(Half-wave pulse of sine wave: 11ms; detection time: 10s)
Min. 1,000 m/s2 {100G} (Half-wave pulse of sine wave: 6ms)
Functional
Rubber bracket A type: 50 Hz to 500 Hz, Min. 100 m/s2 {10G}
Screw-mounting and direct coupling type: 33 Hz, Min. 44.1 m/s2 {4.5G} (Detection time: 10s)
Destructive
Rubber bracket A type: 50 Hz to 500 Hz, Min. 100 m/s2 {10G}
Screw-mounting and direct coupling type: 33 Hz, Min. 44.1 m/s2 {4.5G},
Time of vibration for each direction; X, Y direction: 2 hours, Z direction: 4 hours
Electrical (at nominal switching capacity)
Conditions for operation, transport and
storage*2
Water-proof standard
Mass
Min. 10 M (at 500V DC,
Measurement at same
location as “Breakdown
voltage” section.)
Destructive
Max. operating speed
Water-proof
standard
Min. 10 M
(at 500V DC, Measurement at same location as
“Breakdown voltage” section.)
500 Vrms for 1 min. (Detection current: 10mA)
Mechanical
Conditions
1.8 W
500 Vrms for 1 min. (Detection current: 10mA)
Functional
20 A continuous
1 A 14V DC
Between contacts and coil
Release time (at 20C 68F)
Mechanical
characteristics
20 A continuous
Between open contacts
Operate time (at 20C 68F)
Shock
resistance
20 A 12 V DC
1.4 W/1.8 W
Min. switching capacity (resistive load)*1
Electrical
characteristics
Max. 0.4 V
(by voltage drop
12 V DC 20 A)
Min. 105 (operating frequency: 2s ON,
2s OFF) (1.4 W and 1.8 W type at 20 A)
Min. 2 104 (operating frequency: 3s
ON, 15s OFF) (1.8 W type at 30 A)
Min. 105 (operating frequency: 2s ON, 2s OFF)
Min. 5 105 (at 120 cpm)
Min. 106 (at 120 cpm)
Ambient temperature: –30C to +80C –22F to +176F,
Humidity: 5% R.H. to 85% R.H. (Not freezing and condensing at low temperature)
15 cpm (1.4 W type: at nominal load,
1.8 W type: at 20 A)
15 cpm (at nominal switching capacity)
Sealed type: JIS D 0203 S2, Dust cover type: JIS D 0203 R2
Rubber bracket A type: 23 g .81 oz,
Screw-mounting and direct coupling type: 19 g .67 oz
31 g 1.09 oz
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 “6. Usage, Storage and Transport
Conditions“ in AMBIENT ENVIRONMENT section in Relay Technical Information.
ds_61201_en_ca: 010113J
3
CA
2) 24 V DC type
Characteristics
Specifications
Item
1 Form C type
Arrangement
Contact
Rating
1 Form C
Contact resistance (Initial)
Typ 3m (By voltage drop 6V DC 1A)
Contact voltage drop
Max. 0.4 V (after electrical life test, by voltage drop 24 V DC 10 A)
Contact material
Ag alloy (Cadmium free)
Nominal switching capacity (resistive load)
(operating frequency: 2s ON, 2s OFF)
10 A 24V DC
Max. carrying current
10 A continuous (at coil applied voltage 28 V DC, 80C 176F)
Nominal operating power
1.8 W
Min. switching capacity (resistive load)*1
1 A 14V DC
Insulation resistance (Initial)
Electrical
characteristics
Between contacts and coil
Release time (at nominal voltage) (at 20C 68F)
Max. 10ms (excluding contact bounce time) (Initial)
Vibration resistance
Water-proof
standard
500 Vrms for 1 min. (Detection current: 10mA)
Max. 10ms (excluding contact bounce time) (Initial)
Mechanical
characteristics
Conditions
500 Vrms for 1 min. (Detection current: 10mA)
Operate time (at nominal voltage) (at 20C 68F)
Shock resistance
Expected life
Min. 10 M (at 500V DC, Measurement at same location as “Breakdown voltage” section.)
Between open contacts
Breakdown voltage
(Initial)
Functional
Min. 100 m/s2 {10G} (Half-wave pulse of sine wave: 11ms; detection time: 10s)
Destructive
Min. 1,000 m/s2 {100G} (Half-wave pulse of sine wave: 6ms)
Functional
33 Hz, Min. 44.1 m/s2 {4.5G} (Detection time: 10s)
Destructive
33 Hz, Min. 44.1 m/s2 {4.5G},
Time of vibration for each direction; X, Y direction: 2 hours, Z direction: 4 hours
Electrical (at nominal switching capacity)
Min. 105 (operating frequency: 2s ON, 2s OFF)
Mechanical
Min. 5 105 (at 120 cpm)
Conditions for operation, transport and storage*2
Ambient temperature: –30C to +80C –22F to +176F,
Humidity: 5% R.H. to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed
15 cpm (nominal switching capacity)
Water-proof standard
JIS D 0203 S2
Mass
31 g 1.09 oz
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 “6. Usage, Storage and Transport
Conditions“ in AMBIENT ENVIRONMENT section in Relay Technical Information.
Electrical life
Nominal coil voltage
1 Form A and 1 Form B type
1 Form C type
Motor load
(operating frequency ON: 2 s, OFF: 2 s)
Halogen lamp load
(operating frequency ON: 1 s, OFF: 14 s)
12 V DC
Min. 105, 20 A 12 V DC
Min. 105, 20 A 12 V DC
12 V DC
Min. 105, 20 A 12 V DC
Min. 105, 20 A 12 V DC
24 V DC
Min. 105, 10 A 24 V DC
Min. 105, 6 A 24 V DC
REFERENCE DATA
1. Coil temperature rise
Samples: CA1aS-12V-N-5, 5pcs.
Measured portion: Inside the coil
Contact carrying current: 20A
Ambient temperature: Room temperature, 85C
185F
2. Ambient temperature and operating voltage
range
Samples: CA1bS-12V-N-5
11
120
100
85°C
185°F
80
60
40
Coil applied voltage, VDC
Room
temperature
35
30
25
20
Operating voltage range
15
10
Pick-up and drop-out voltage, V
40
140
Temperature rise, °C
3. Ambient temperature characteristics
(Cold start)
10
9
Pick-up voltage
8
7
Drop-out voltage
6
5
4
3
2
20
5
0
12
4
14
16
Coil applied voltage, V
0
−40 −30 −20
0
Pick-up voltage
(Cold start)
20 40 60 8085 100 120
Ambient temperature, °C
1
0
−30
80
20
Ambient temperature, °C
ds_61201_en_ca: 010113J
CA
4. Distribution of pick-up and drop-out voltage
5. Operate and release time characteristics
Quantity: 50pcs.
Sample: CA1a-12V-N-5, 10pcs.
Pick-up voltage
Drop-out voltage
Quantity, n
50
40
30
20
25
Operate and release time, ms
60
20
15
10
5
10
0
Operate time
Release time
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
0
6
8
10
12
14
Max.
X
Min.
Max.
X
Min.
16
Coil applied voltage, %V
Voltage, V
6.-(1) Electrical life test (Motor load)
Sample: CA1a-12V-C, 3pcs.
Load: Inrush current: 63A, steady current: 23A
Blower fan motor actual load (motor free)
Operating frequency: ON 2s, OFF 2s
Ambient temperature: Room temperature
Load current waveform
Change of pick-up and drop-out voltage
Change of contact resistance
Load: Inrush current: 63A, steady current: 23A,
10A
500ms
10
9
8
7
Pick-up voltage
6
Max.
X
Min.
5
4
Drop-out voltage
3
Max.
X
Min.
2
Contact resistance, mΩ
Pick-up and drop-out voltage, V
10
8
6
Max.
4
X
Min.
2
1
0
0
10
0
20
0
10
20
No. of operations, x 104
No. of operations, x 104
6.-(2) Electrical life test (Lamp load)
Sample: CA1a-12V-C, 3pcs.
Load: 60Wx4, Inrush current: 110A, steady current: 20A
Halogen lamp actual load
Operating frequency: ON 1s, OFF 14s
Ambient temperature: Room temperature
Load current waveform
Change of pick-up and drop-out voltage
Change of contact resistance
Load: Inrush current: 110A, steady current: 20A,
20A
10
10
9
9
8
7
6
Pick-up voltage
Max.
X
Min.
5
4
3
Drop-out voltage
Max.
X
Min.
2
0
10
No. of operations, x 10
ds_61201_en_ca: 010113J
8
7
6
5
4
3
Max.
X
Min.
2
1
1
0
Contact resistance, mΩ
Pick-up and drop-out voltage, V
200ms
20
4
0
0
10
20
No. of operations, x 104
5
CA
DIMENSIONS (mm inch)
CAD Data
Data from our Web site.
Download CAD
1. 1 Form A/1 Form B
Rubber bracket A type
External dimensions
Schematic (Bottom View)
CAD Data
21.5
.846
14.4
.567
2.5
10 .098
.394
1 Form A
1 Form B
15
.591
37
1.457
Note: Including resistor type also available.
17.4
.685
19.5
.768
9
.354
Sealed with
epoxy resin
Including resistor
(1 Form A)
5.5
.217
15.4
.606
12.4
.488
1.5
.059
2
.079
17
.669
21.5
.846
2. 1 Form A/1 Form B
Screw-mounting type
0.8
.031
2.4
.094
6
.236
Dimension:
Max. 1mm .039 inch:
1 to 3mm .039 to .118 inch:
Min. 3mm .118 inch:
External dimensions
CAD Data
6.5 +0.3
Ð0 dia. hole
.256 +.012
Ð0 dia.
R10
Schematic (Bottom View)
14.4
.567
14
.551
General tolerance
0.1 .004
0.2 .008
0.3 .012
3 .118
2 .079
1 Form A
1 Form B
17.5
.689
7
.276
Note: Including resistor type also available.
37
1.457
21.5 .846
Sealed with
epoxy resin
19.5 .768
9
.354
17.4
.685
5.5
.217
15.4
.606
12.4
.488
6 .236
6
Including resistor
(1 Form A)
0.8
.031 2.4
.094
Dimension:
Max. 1mm .039 inch:
1 to 3mm .039 to .118 inch:
Min. 3mm .118 inch:
General tolerance
0.1 .004
0.2 .008
0.3 .012
ds_61201_en_ca: 010113J
CA
3. 1 Form A/1 Form B
Direct coupling type
External dimensions
Schematic (Bottom View)
CAD Data
21.5
.846
1 Form A
14.4
.567
1 Form B
37
1.457
Note: Including resistor type also available.
Sealed with
epoxy resin
17.4
.685
19.5 .768
9
.354
5.5
.217
Including resistor
(1 Form A)
15.4
.606
12.4
.488
0.8
.031 2.4
.094
6 .236
4. 1 Form C
Screw-mounting type
Dimension:
Max. 1mm .039 inch:
1 to 3mm .039 to .118 inch:
Min. 3mm .118 inch:
External dimensions
Schematic (Bottom View)
CAD Data
6.6 dia. hole
.260 dia.
14
.551
4
.157
R10
1 Form C
2
.079
20
.787
12
.472
Note: Including resistor type also available.
59
28 2.323
1.102
40
1.575
31.2 1.228
28.4 1.118
23.4
.921
0.8
.031
6
.236
5. 1 Form C
Direct coupling type
9
9
.354 .354
General tolerance
0.1 .004
0.2 .008
0.3 .012
19.4
.764
Including resistor
5.5
.217
11.4 12.2
.449 .480
2.4
.094
Sealed with
epoxy resin
Dimension:
Max. 1mm .039 inch:
1 to 3mm .039 to .118 inch:
Min. 3mm .118 inch:
External dimensions
General tolerance
0.1 .004
0.2 .008
0.3 .012
Schematic (Bottom View)
CAD Data
1 Form C
28
1.102
40
1.575
Note: Including resistor type also available.
31.2 1.228
28.4 1.118
23.4
.921
0.8
.031
6
.236
9
9
.354 .354
19.4
.764
5.5
.217
Including resistor
11.4 12.2
.449 .480
2.4
.094
Sealed with
epoxy resin
Dimension:
Max. 1mm .039 inch:
1 to 3mm .039 to .118 inch:
Min. 3mm .118 inch:
General tolerance
0.1 .004
0.2 .008
0.3 .012
For Cautions for Use, see Relay Technical Information.
ds_61201_en_ca: 010113J
7