CA
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ds_61201_en_ca: 010113J
ORDERING INFORMATION
AUTOMOTIVE POWER
RELAYS — SMALL SIZE,
LIGHT WEIGHT CA RELAYS
FEATURES
• 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 operatin g 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 cha racteristics
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)
TYPICAL APPLICATIONS
• Motorcycles and automobiles
Motorcycle cell motors, car air
conditioners, halogen lamps, etc.
• Agricultural equipment
• Battery equipped devices su ch as
conveyance vehicles
Contact arrangement
1a:
1b:
1:
1 Form A
1 Form B
1 Form C
CA
Protective construction
Nil:
F:
Sealed type
Dust cover type
Nominal operating power
Nil:
S:
Standard type (1.8 W)
Low operating power type (1.4 W) (1 Form A, 1 Form B)
Protective element
Nil:
R:
None (Standard type)
With resistor inside
Coil voltage (DC)
12 V, 24 V (1 Form C only)
Mounting method
A:
N:
C:
Rubber bracket A type (1 Form A, 1 Form B)
Screw mounting type
Direct coupling type
Classification by type
Nil:
5:
1 Form C
1 Form A or 1 Form B
CA
2ds_61201_en_ca: 010113J
TYPES
Standard packing: Carton: 20 pcs. Case: 200 pcs.
Note: Pl e ase use “CAR--- or CASR---” with resistor inside type. (Asterisks “ ” should be filled in from ORDERING INFORMATION.)
RATING
1. Coil data
Note: Other pick-up voltage types are also available. Please contact us for details.
Contact arrangement Coil voltage Mounting type Standard type Low operating power type
Sealed type Dust cover type Sealed type Dust cover type
Part No. Part No. Part No. Part No.
1 Form A 12 V DC Rubber bracket A 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
1 Form B 12 V DC 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 CA1b-12V-C-5 CA1bF-12V-C-5 CA1bS-12V-C-5 CA1bFS-12V-C-5
1 Form C 12 V DC Screw-mounting CA1-12V-N – – –
Direct coupling CA1-12V-C – – –
24 V DC Screw-mounting CA1-24V-N – – –
Direct coupling CA1-24V-C – – –
Nominal coil
voltage Pick-u p volt age
(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 801.8 W 10 to 16V DC
Low oper a t i n g po w er type
1 Form A and 1 Form B 12 V DC Max. 8 V DC 0.6 to 6 V DC 120 mA 1001.4 W 10 to 16V DC
1 Form C 12 V DC Max. 8 V DC Min. 0.6 V DC 150 mA 801.8 W 10 to 15V DC
24 V DC Max. 16 V DC Min. 1.2 V DC 75 mA 3201.8 W 20 to 30V DC
CA
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ds_61201_en_ca: 010113J
2. Specifications
1) 12 V DC type
Notes:
*1. This value can change due to the switching fr equency , environmental condit ions, and desired reliability level, therefore it is recommended t o 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 T r ansport
Conditions“ in AMBIENT ENVIRONMENT section in Relay Technical Information.
Characteristics Item Specifications
1 Form A type 1 Form B type 1 Form C typ e
Contact
Arrangement 1 Form A 1 Form B 1 Form C
Contact resist ance (Initial) Typ 3m (By voltage drop 6V DC 1A)
Contact volt age drop (after electrical life test)
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)]
Max. 0.3 V
(by voltage drop
12 V DC 20 A)
Max. 0.4 V
(by voltage drop
12 V DC 20 A)
Contact material Ag alloy (Cadmium free)
Rating
Nominal switching capacity (resistive load) 20 A 12V DC (1.4 W type)
30 A 12V DC (1.8 W type) 20 A 12 V DC
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) 20 A continuous 20 A continuous
Nominal operating power 1.4 W/1.8 W 1.8 W
Min. switching capacity (resistive load)*11 A 14V DC
Electrical
characteristics
Insulation resistance (Initial) Min. 10 M
(at 500V DC, Measurement at same location as
“Breakdown voltage” section.)
Min. 10 M (at 500V DC,
Measurement at same
location as “Breakdown
voltage” section. )
Breakdown
voltage (Initial) 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 20 C 68F) Max. 10ms (at nominal voltage) (excluding contact bounce time) (Initial)
Release time (at 20C 68F) Max. 10ms (at no minal voltage) (excluding contact bounce t ime) (Initial)
Mechanical
characteristics
Shock
resistance Functional 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)
Destructive Min. 1,000 m/s2 {100G} (Half-wave pulse of sine wave: 6ms)
Vibration
resistance
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 t ype: 33 Hz, Min. 44.1 m/s2 {4.5G},
T i me of vibration for each direction; X, Y direction: 2 hours, Z direction: 4 hours
Expected life Electrical (at nominal switching capacity)
Min. 105 (operating frequ ency: 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)
Mechanical Min. 106 (at 120 cpm) Min. 5 105 (at 120 cpm)
Conditions
Conditions for operation, transport and
storage*2Ambient 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 (1.4 W type: at nominal load,
1.8 W type: at 20 A) 15 cpm (at nominal switching capacity)
Water-proof
standard Water-proof standard Sealed type: JIS D 0203 S2, Dust cover type: JIS D 0203 R2
Mass Rubber bracket A type: 23 g .81 oz,
Screw-mounting and direct coupling type: 19 g . 67 oz 31 g 1.09 oz
CA
4ds_61201_en_ca: 010113J
2) 24 V DC type
Notes:
*1. This value can change due to the switch ing frequency , environment al 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
REFERENCE DATA
Characteristics Item Specifications
1 Form C type
Contact
Arrangement 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)
Rating
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, 80 C 176F)
Nominal operating power 1.8 W
Min. switching capacity (resistive load)*11 A 14V DC
Electrical
characteristics
Insulation resistance (Initial) Min. 10 M (at 500V DC, Measurement at same location as “Breakdown voltage” section.)
Breakdown voltage
(Initial) Between open cont acts 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 20C 68F) Max. 10ms (excluding contact bounce time) (Initial)
Release time (at nominal voltage) (at 20C 68F) Max. 10ms (excluding contact bounce time) (Initial)
Mechanical
characteristics
Shock resistance 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)
Vibration resistance Functional 33 Hz, Min. 44.1 m/s2 {4.5G} (Detection time: 10s)
Destructive 33 Hz, Min. 44.1 m/s2 {4.5G},
T i me of vibration for each direction; X, Y direction: 2 hours, Z direction: 4 hours
Expected life Electrical (at nominal switching capacity) Min. 105 (operating frequency: 2s ON, 2s OFF)
Mechanical Min. 5 105 (at 120 cpm)
Conditions Conditions for operation, transport and storage*2Ambient temperature: –30C to +80C –22F to +176F,
Humidity: 5% R.H. to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating sp eed 15 cpm (nominal switching capacity)
Water-proof
standard Water-proof standard JIS D 0203 S2
Mass 31 g 1.09 oz
Nominal coil voltage Motor load
(operating frequency ON: 2 s, OFF: 2 s) Halogen lamp load
(operating frequency ON: 1 s, OFF: 14 s)
1 Form A and 1 Form B type 12 V DC Min. 105, 20 A 12 V DC Min. 105, 20 A 12 V DC
1 Form C type 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
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 3. Ambient temperature characteristics
(Cold start)
Samples: CA1bS-12V-N-5
12 14 16
140
120
100
80
60
40
20
0
85°C
Room
temperature
Temperature rise, °C
Coil applied voltage, V
185°F
0
Ambient temperature, °C
Coil applied voltage, VDC
5
10
15
35
30
25
20
40
−40 −20−30
20 40 60 1000 120
8085
Pick-up voltage
(Cold start)
Operating voltage range
0
Ambient temperature, °C
Pick-up and drop-out voltage, V
10
8
6
4
2
11
1
3
5
7
9
−30 20 80
Pick-up voltage
Drop-out voltage
CA
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ds_61201_en_ca: 010113J
4. Distribution of pick-up and drop-out voltage
Quantity: 50pcs. 5. Operate and release time characteristics
Sample: CA1a-12V-N-5, 10pcs.
0
30
20
10
40
50
60
Voltage, V
Quantity, n
1.51.00.50 2.0 2.5 3.0 3.5 4.5 5.04.0 5.5 6.0 6.5
Pick-up voltage
Drop-out voltage
0
Coil applied voltage, %V
Operate and release time, ms
Max.
Min.
X
Max.
Min.
15
20
10
5
25
01610 12 1468
Operate time
Release time
X
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
Load: Inrush current: 63A, steady current: 23A, Change of pick-up and drop-out voltage Change of contact resistance
500ms
10A
0
No. of operations, x 104
Contact resistance, mΩ
Max.
Min.
X
2
4
6
8
10
02010
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
Load: Inrush current: 110A, steady current: 20A, Change of pick-up and drop-out voltage Change of contact resistance
200ms
20A
0
No. of operations, x 10
4
Pick-up and drop-out voltage, V
Max.
Max.
Min.
Min.
X
X
2
1
4
6
8
9
7
5
3
10
02010
Pick-up voltage
Drop-out voltage
0
No. of operations, x 104
Contact resistance, mΩ
Max.
Min.
X
2
4
6
8
10
1
3
5
7
9
02010
CA
6ds_61201_en_ca: 010113J
DIMENSIONS (mm inch)
Download from our Web site.
CAD Data
CAD Data
1. 1 Form A/1 Form B
Rubber bracket A type
CAD Data
External dimensions
21.5
.846
19.5
.768
9
.354
37
1.457
14.4
.567
17.4
.685
10
.394
15
.591
2.5
.098
6
.236
21.5
.846
17
.669
0.8
.031
15.4
.606
12.4
.488
5.5
.217
2.4
.094
1.5
.059
2
.079
Sealed with
epoxy resin
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)
1 Form A
Including resistor
(1 Form A)
1 Form B
Note: Including resistor type also available.
2. 1 Form A/1 Form B
Screw-mounting type
CAD Data
External dimensions
14
.551
9
.354
2 .079
17.4
.685
21.5 .846
3 .118
14.4
.567
6 .236
0.8
.031
15.4
.606
12.4
.488
5.5
.217
2.4
.094
17.5
.689
37
1.457
7
.276
R10
6.5 dia. hole
+0.3
Ð0
.256 dia.
+.012
Ð0
Sealed with
epoxy resin
19.5 .768
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)
1 Form A
Including resistor
(1 Form A)
1 Form B
Note: Including resistor type also available.
CA
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ds_61201_en_ca: 010113J
For Cautions for Use, see Relay Technical Information.
3. 1 Form A/1 Form B
Direct coupling type
CAD Data
External dimensions
21.5
.846
9
.354
17.4
.685
14.4
.567
6 .236 0.8
.031
15.4
.606
12.4
.488
5.5
.217
2.4
.094
37
1.457
Sealed with
epoxy resin
19.5 .768
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)
1 Form A
Including resistor
(1 Form A)
1 Form B
Note: Including resistor type also available.
4. 1 Form C
Screw-mounting type
CAD Data
External dimensions
14
.551
23.4
.921
19.4
.764
31.2 1.228
4
.157 2
.079
5.5
.217
2.4
.094
0.8
.031 12.2
.480
12
.472
40
1.575
59
2.323
28
1.102
R10
6.6 dia. hole
.260 dia.
28.4 1.118
20
.787
9
.354 9
.354
6
.236
11.4
.449
Sealed with
epoxy resin
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)
Note: Including resistor type also available.
Including resistor
1 Form C
5. 1 Form C
Direct coupling type
CAD Data
External dimensions
19.4
.764
5.5
.217
2.4
.094
0.8
.031 12.2
.480
40
1.575
28
1.102
9
.354 9
.354
6
.236
11.4
.449
Sealed with
epoxy resin
23.4
.921
31.2 1.228
28.4 1.118
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)
Note: Including resistor type also available.
Including resistor
1 Form C