CA
Products with diode inside are discontinued in 2014.
1
ds_61201_en_ca: 030412D
SPECIFICATIONS
Contact
#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.
Automotive power relays -
small size, light weight CA RELAYS
Type 12 V DC 24 V DC
Arrangement 1 Form A 1 Form B 1 Form C 1 Form C
Initial contact resistance
(By voltage drop 6 V DC 1A) Max. 50 m
Contact material AgSnO2 type
Contact voltage drop
Max. 0.3 V
After electrical life test,
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
After electrical life test,
by voltage drop
12 V DC 20 A
Max. 0.4 V
After electrical life test,
by voltage drop
12 V DC 20 A
Max. 0.4 V
After electrical life test,
by voltage drop
24 V DC 10 A
Rating
Nominal switching capacity
(resistive load)
20 A 12 V DC
(1.4 W type)
30 A 12 V DC
(1.8 W type) 20 A 12 V DC 10 A 24 V DC
(ON: 2s, OFF: 2s)
Max. switching voltage 16 V 15 V 30 V
Max. switching current 120 A (1.4 W type)
150 A (1.8 W type) 120 A 100 A 50 A (Inrush current)
Max. carrying current 20 A continuous
(1.4 W type)
30 A for 1 min
(1.8 W type) 20 A continuous 20 A continuous 10 A continuous
Min. switching capacity#1 1 A 12 V DC 1 A 24 V DC
Nominal operating power 1.4 W / 1.8 W 1.8 W
Expected
life (min.
operations)
Mechanical (at 120 cpm) 1065105
Electrical
20 A
(1.4 W, 1.8 W type) 105
(ON: 2s, OFF: 2s) 105 (ON 2s, OFF 2s) 105 (ON 2s, OFF 2s)
30 A
(1.8 W type) 2104
(ON: 3s, OFF: 15s)
Products with diode inside are
discontinued in 2014.
If you are seeking a CA relay type not listed in this current data sheet, please
refer to the one under the rubric “Discontinued / Not for new applications”.
Products to be discontinued.
FEATURES
1. 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)
2. Low operating power (1.4W) type is
available (1 Form A, 1 Form B)
3. Since the terminal arrangement
complies with JIS D5011 B4-M1,
commercial connectors are available
for these types of relays.
CA Products with diode inside are discontinued in 2014.
2ds_61201_en_ca: 030412D
Characteristics (at 20C 68F)
Electrical life (min. operation)
Remarks
ORDERING INFORMATION
Types with diode inside are only available until 2014.
Type 12 V DC 24 V DC
Max. operating speed 15 cpm 1.4 W type: at nominal load
1.8 W type: at 20 A 15 cpm (at nominal load)
Initial insulation resistance Min. 10 M at 500 V DC
Initial breakdown
voltage*1Between open contacts 500 V rms for 1 min.
Between contacts and coil
500 V rms for 1 min.
Operate time*2 (at nominal voltage) Max. 10 ms at 20C (initial) Max. 10 ms (initial)
Release time (without diode)*2
(at nominal voltage) Max. 10 ms at 20C (initial) Max. 10 ms (initial)
Shock resistance Functional*3Min. 200 m/s2 {20 G} Min. 100 m/s2 {10 G} Min. 100 m/s2 {10 G}
Destructive*4Min. 1,000 m/s2 {100 G}
Vibration resistance Functional*5Rubber bracket A type: Min. 100 m/s2 {10 G}, 50 Hz to 500 Hz
Direct coupling type or Screw-mounting type: Min. 44.1 m/s2 {4.5 G}, 33Hz Min. 44.1 m/s2 {4.5 G},
33 Hz
Destructive*6Rubber bracket A type: Min. 100m/s2 {10 G}, 50 Hz to 500 Hz
Direct coupling type or Screw-mounting type: Min. 44.1 m/s2 {4.5 G}, 33Hz Min. 44.1 m/s2 {4.5 G},
33 Hz
Conditions for operation,
transport and storage*7
(Not freezing and condensing
low temperature)
Ambient
temp. –30C to +80C –22F to +176F
Humidity 5% R.H. to 85% R.H.
Water-proof standard Plastic sealed type: JIS DO203S2, Dust cover type: JIS DO203R2 JIS DO203S2
Mass Rubber bracket A type: 23 g .81 oz
Direct coupling type or Screw-mounting type:
19 g .67 oz 31 g 1.09 oz
Nominal coil voltage, V DC Motor load
(operating frequency ON: 2 s, OFF: 2 s) Halogen lamp load
(operating frequency ON: 1 s, OFF: 14 s)
1 Form A, 1 Form B 12 105, 20 A 12 V DC 105, 20 A 12 V DC
1 Form C 12 105, 20 A 12 V DC 105, 20 A 12 V DC
24 105, 10 A 24 V DC 105, 6 A 24 V DC
()
*1Detection current: 10 mA
*2Excluding contact bounce time
*3Half-wave pulse of sine wave: 11ms; detection time: 10s
*4Half-wave pulse of sine wave: 6ms
*5Detection time: 10s
*6Time of vibration for each direction; X, Y, direction: 2 hours, Z direction: 4 hours
*7Refer to “6. Usage, Storage and Transport Conditions“ in AMBIENT
ENVIRONMENT section in Relay Technical Information.
CA 1a F S 12 V A 5
Contact
arrangement
Notes: 1. Type with resistor/diode inside are available as options. Please consult our sales office.
2. Standard packing: Carton: 20 pcs. Case: 200 pcs.
Mounting method
Classification by type
1a: 1 Form A
1b: 1 Form B
1 : 1 Form C
Protective construction
Nil: Plastic sealed type
F: Dust cover type
Coil voltage
(DC)
12 V
24 V (1 Form C only)
Nil: 1 Form C
5: 1 Form A or
1 Form B
Nominal operating power
Nil: Standard type (1.8 W)
S: Low operating power type (1.4 W)
(1 Form A, 1 Form B)
A: Rubber bracket A type
A: (1 Form A, 1 Form B)
N: Screw mounting type
C: Direct coupling type
CA
Products with diode inside are discontinued in 2014.
3
ds_61201_en_ca: 030412D
COIL DATA
1) Standard type
2) Low operating power type
DIMENSIONS(mm inch)
Contact
arrangement Mounting type Plastic sealed
type Dust cover type Nominal
voltage,
V DC
Pick-up voltage,
V DC
(at 20C 68F)
Drop-out
voltage, V DC
(at 20C 68F)
Nominal
operating
current, mA
(at 20C 68F)
Coil resistance,
(at 20C 68F)
Nominal
operating
power, W
(at 20C 68F)
Usable
voltage
range, V
DC
1 Form A Rubber bracket A CA1a-12V-A-5 CA1aF-12V-A-5 12 Max. 8 Min. 0.6 to 6 15010% 8010% 1.8 10 to 16
Screw-mounting CA1a-12V-N-5 CA1aF-12V-N-5 12 Max. 8 Min. 0.6 to 6 15010% 8010% 1.8 10 to 16
Direct coupling CA1a-12V-C-5 CA1aF-12V-C-5 12 Max. 8 Min. 0.6 to 6 15010% 8010% 1.8 10 to 16
1 Form B Rubber bracket A CA1b-12V-A-5 CA1bF-12V-A-5 12 Max. 8 Min. 0.6 to 6 15010% 8010% 1.8 10 to 16
Screw-mounting CA1b-12V-N-5 CA1bF-12V-N-5 12 Max. 8 Min. 0.6 to 6 15010% 8010% 1.8 10 to 16
Direct coupling CA1b-12V-C-5 CA1bF-12V-C-5 12 Max. 8 Min. 0.6 to 6 15010% 8010% 1.8 10 to 16
1 Form C
Screw-mounting CA1-DC12V-N – 12 Max. 8 Min. 0.6 15010% 8010% 1.8 10 to 15
Direct coupling CA1-DC12V-C – 12 Max. 8 Min. 0.6 15010% 8010% 1.8 10 to 15
Screw-mounting CA1-DC24V-N – 24 Max. 16 Min. 1.2 7510% 32010% 1.8 20 to 30
Direct coupling CA1-DC24V-C – 24 Max. 16 Min. 1.2 7510% 32010% 1.8 20 to 30
Contact
arrangement Mounting type Plastic sealed
type Dust cover type Nominal
voltage,
V DC
Pick-up voltage,
V DC
(at 20C 68F)
Drop-out
voltage, V DC
(at 20C 68F)
Nominal
operating
current, mA
(at 20C 68F)
Coil resistance,
(at 20C 68F)
Nominal
operating
power, W
(at 20C 68F)
Usable
voltage
range, V
DC
1 Form A Rubber bracket A CA1aS-12V-A-5 CA1aFS-12V-A-5 12 Max. 8 Min. 0.6 to 6 12010% 10010% 1.4 10 to 16
Screw-mounting CA1aS-12V-N-5 CA1aFS-12V-N-5 12 Max. 8 Min. 0.6 to 6 12010% 10010% 1.4 10 to 16
Direct coupling CA1aS-12V-C-5 CA1aFS-12V-C-5 12 Max. 8 Min. 0.6 to 6 12010% 10010% 1.4 10 to 16
1 Form B Rubber bracket A CA1bS-12V-A-5 CA1bFS-12V-A-5 12 Max. 8 Min. 0.6 to 6 12010% 10010% 1.4 10 to 16
Screw-mounting CA1bS-12V-N-5 CA1bFS-12V-N-5 12 Max. 8 Min. 0.6 to 6 12010% 10010% 1.4 10 to 16
Direct coupling CA1bS-12V-C-5 CA1bFS-12V-C-5 12 Max. 8 Min. 0.6 to 6 12010% 10010% 1.4 10 to 16
Download from our Web site.
CAD Data
CAD Data
1. 1 Form A/1 Form B
Rubber bracket A type
CAD Data 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)
diode type
1 Form A
Including load
(1 Form A)
Including diode
(1 Form C)
1 Form B
Including diode type, including load type also available.
CA Products with diode inside are discontinued in 2014.
4ds_61201_en_ca: 030412D
2. 1 Form A/1 Form B
Screw-mounting type
CAD Data 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)
diode type
1 Form A
Including load
(1 Form A)
Including diode
(1 Form C)
1 Form B
Including diode type, including load type also available.
3. 1 Form A/1 Form B
Direct coupling type
CAD Data
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
mm inch
SCHEMATIC (Bottom View)
diode type
1 Form A
Including load
(1 Form A)
Including diode
(1 Form C)
1 Form B
Including diode type, including load type also available.
CA
Products with diode inside are discontinued in 2014.
5
ds_61201_en_ca: 030412D
REFERENCE DATA
4. 1 Form C
Screw-mounting type
CAD Data 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)
diode type
Including diode type, including load type also available.
Including load
(1 Form C)
Including diode
(1 Form A)
1 Form C
5. 1 Form C
Direct coupling type
CAD Data
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)
diode type
Including diode type, including load type also available.
Including load
(1 Form C)
Including diode
(1 Form A)
1 Form C
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. Max. switching capability (Resistive load) 3. Ambient temperature and operating
temperature range
12 14 16
140
120
100
80
60
40
20
0
85°C
185°F
Room
temperature
Temperature rise, °C
Coil applied voltage, V
0
Switching current, A
Switching voltage, VDC
10
50
40
30
20
60
020304010 50
(N.O. side Room temperature)
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
Operation range
Pick-up voltage
(Cold start)
CA Products with diode inside are discontinued in 2014.
6ds_61201_en_ca: 030412D
4. Ambient temperature characteristics
(Cold start)
Samples: CA1bS-12V-N-5
5. Distribution of pick-up and drop-out voltage
Quantity: 50pcs. 6. Distribution of operate and release time
Sample: CA1a-12V-N-5, 10pcs.
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
0
30
20
10
40
50
60
Voltage, V
Frequency, 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
7-(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)
Switching frequency: (ON:OFF = 2s: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, × 104
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, × 104
Contact resistance, m
Max.
Min.
X
2
4
6
8
10
02010
7-(2). Electrical life test (Lamp load)
Sample: CA1a-12V-C, 3pcs.
Load: 60Wx4, Inrush current: 110A, steady current: 20A
Halogen lamp actual load
Switching frequency: (ON:OFF = 1s: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, × 104
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, × 10
4
Contact resistance, m
Max.
Min.
X
2
4
6
8
10
1
3
5
7
9
02010
CA
Products with diode inside are discontinued in 2014.
7
ds_61201_en_ca: 030412D
Cautions regarding the protection element
For Cautions for Use, see Relay Technical Information.
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 (680 to 1,000).
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 (2,800 to
4,700).
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
revert 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.
