CM
SPECIFICATIONS
AUTOMOTIVE MICRO-ISO
RELAY CM RELAYS
15
.591
22
.866
20
.787
15
.591
23
.906
20
.787
mm inch
RoHS Directive compatibility information
http://www.nais-e.com/
FEATURES
• Micro-ISO type terminals
• Small size:
20 mm(L)×15 mm(W)×22 mm(H)
.787 inch(L)×.591 inch(L)×.866 inch(H)
• Wide line-up
PC board and Plug-in type, Resistor and
diode inside type.
24V DC type is also available.
• Compact and high-capacity 35A load
switching
N.O.: 35A 14V DC, N.C.: 20A 14V DC
(Sealed type)
Min. 5 × 104
N.O.: 35A 14V DC, N.C.: 20A 14V DC
(Flux-resistant type)
Min. 105 *12V DC type
• Uses international standard ISO
terminal arrangement.
The ISO international standard terminal
arrangement is used.
TYPICAL APPLICATIONS
• Fan motor
• Heater
• Head lump
• Air Compressor
• EPS
• ABS
• Blower fan
• Defogger, etc.
6 8
.236 .315
9
.354
(plug-in type)
Contact
Coil
#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.
Characteristics
Remarks
*1At nominal switching capacity, operating frequency: 2s ON, 2s OFF
*2Measurement at same location as “Initial breakdown voltage” section.
*3Detection current: 10mA
*4Excluding contact bounce time.
*5Half-wave pulse of sine wave: 11 ms; detection time: 10 µs
*6Half-wave pulse of sine wave: 6 ms
*7Time of vibration for each direction; X, Y, Z direction: 4 hours
*8Refer to Conditions for operation, transport and storage mentioned in AMBIENT
ENVIRONMENT.
Please inquire if you will be using the relay in a high temperature atmosphere.
Type 12 V coil voltage 24 V coil voltage
Arrangement 1 Form A, 1 Form C
Contact material Ag alloy (Cadmium free)
Initial contact resistance (Initial)
(By voltage drop 6 V DC 1 A)
Typ. 2 mΩ
Contact voltage drop
Max. N.O.: 0.5 V
(at 35 A 14 V DC)
Max. N.C.: 0.3 V
(at 20 A 14 V DC)
Max. N.O.: 0.3 V
(at 15 A 28 V DC)
Max. N.C.: 0.2 V
(at 8 A 28 V DC)
Rating
(resistive
load)
Nominal
switching
capacity
N.O.: 35 A 14 V DC
N.C.: 20 A 14 V DC
N.O.: 15 A 28 V DC
N.C.: 8 A 28 V DC
Max. carrying
current
N.O.: 20 A
(14 V DC,
at 85°C 185°F)
N.C.: 10 A
(14 V DC,
at 85°C 185°F)
N.O.: 15 A
(28 V DC,
at 85°C 185°F)
N.C.: 8 A
(28 V DC,
at 85°C 185°F)
Min. switching
capacity#1 1 A 12 V DC 1 A 24 V DC
Expected
life
Mechanical
(at 120 cpm) Min. 106
Electrical
(at rated load)
Flux-resistant type: Min. 105*1
Sealed type: Min. 5 × 104
Nominal operating power
1.5 W
1.7 W
(with resistor
inside type)
1.8 W
2.0 W
(with resistor
inside type)
Type 24V coil type 12V coil type
Max. operating speed
(at nominal switching capacity) 15 cpm
Initial insulation resistance*2Min. 20 MΩ (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) (at 20°C 85°F)Max. 10 ms (initial)
Release time*4
(at nominal voltage) (at 20°C 85°F)
Max. 10 ms
Max. 15 ms (with diode) (initial)
Shock resistance Functional*5Min. 200 m/s2 {20G}
Destructive*6Min. 1,000m/s2 {100G}
Vibration
resistance
Functional 10 Hz to 500 Hz,
Min. 44.1 m/s2 {4.5 G}
Destructive*710 Hz to 2,000 Hz,
Min. 44.1 m/s2 {4.5 G}
Conditions for
operation, trans-
port and storage*8
(Not freezing and
condensing at low
temperature)
Ambient temp. –40°C to + 85°C
–40°F to + 185°F
Humidity 5% R.H. to 85% R.H.
Mass Approx. 20g .71oz
XY
Z
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CM
ORDERING INFORMATION
TYPES
Packing quantity: Inner 50pcs, Outer 200pcs.
COIL DATA (at 20°C 68°F)
DIMENSIONS mm inch
Contact arrangement Part No. Coil voltage Mounting classification Protective construction
1 Form A
CM1a-12V
12 V DC
Plug-in type Sealed type
CM1aF-12V Flux-resistant type
CM1a-P-12V PC board type Sealed type
CM1aF-P-12V Flux-resistant type
1 Form C
CM1-12V Plug-in type Sealed type
CM1F-12V Flux-resistant type
CM1-P-12V PC board type Sealed type
CM1F-P-12V Flux-resistant type
Contact arrangement Part No. Coil voltage Mounting classification Protective construction
1 Form A
CM1a-24V
24 V DC
Plug-in type Sealed type
CM1aF-24V Flux-resistant type
CM1a-P-24V PC board type Sealed type
CM1aF-P-24V Flux-resistant type
1 Form C
CM1-24V Plug-in type Sealed type
CM1F-24V Flux-resistant type
CM1-P-24V PC board type Sealed type
CM1F-P-24V Flux-resistant type
Nominal voltage,
V DC
Pick-up voltage,
V DC
Drop-out voltage,
V DC
Nominal current,
mA
Coil resistance,
ohm
Nominal operating
power, W
Usable voltage
range, V DC
12 3 to 7 1.2 to 4.2 125±10% 96±10% 1.5 10 to 16
24 6 to 14 2.4 to 8.4 75±10% 320±10% 1.8 20 to 32
CM
Contact arrangement
1a: 1 Form A
1: 1 Form C
Nil: Sealed type
F: Flux-resistant type
Nil: Standard type
D: with diode inside
R: with resistor inside
Nil: Plug-in type
P: PC board type
12 V
24 V
Protective construction Classification of types Mounting classification Coil voltage (DC)
1 F R P 12V
Note: Bulk package: 50 pcs.; Case: 200 pcs.
1. Micro-ISO Plug-in type (1 Form C)
Sealed by epoxy resin
86
85
87 87
30
2-1.75 dia.
2-.069 dia.
3-1.5 dia.
3-.059 dia.
A*
8
.315
2.1
.083
20
.787 15
.591
0.8
.031
4.8
.189 6.3
.248
14
.551
0.8
.031
a
3.25
.128
9
.354
11
.433
22
.866
4.25
.167
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)
Including diode type,
including resistor type also available
30
85
86
87a
87
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CM
2. Micro-ISO Plug-in type (1 Form A)
86
85
8a87
30
7
Sealed by epoxy resin
2-1.75 dia.
2-.069 dia.
3-1.5 dia.
3-.059 dia.
A*
8
.315
2.1
.083
20
.787 15
.591
0.8
.031
4.8
.189 6.3
.248
15
.591
0.8
.031
3.25
.128
9
.354
11
.433
22
.866
4.25
.167
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)
30
85
86
87
Including diode type,
including resistor type also available
mm inch
3. Micro-ISO PC board type (1 Form C)
Pre-soldering
Sealed by epoxy resin
86
85
87
a87
30
A*
2.5
.098
8
.315
2.1
.083
2.1
.083
20
.787
15
.591
0.8
.031
4.8
.189 6.3
.248
15
.591
0.8
.031
9
.354
23
.906
MAX. 1.2
MAX. .047
1
.039
3.5
.138
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
* Dimensions (thickness and width) of terminal specified in this catalog is measured before pre-soldering.
Intervals between terminals is measured at A surface level.
Schematic (Bottom view)
Including diode type,
including resistor type also available
30
85
86
87a
87
4. Micro-ISO PC board type (1 Form A)
86
85
87
a87
30
Sealed by epoxy resin
Pre-soldering A*
2.5
.098
8
.315
2.1
.083
2.1
.083
20
.787
15
.591
0.8
.031
4.8
.189 6.3
.248
15
.591
0.8
.031
9
.354
23
.906
MAX. 1.2
MAX. .047
1
.039
3.5
.138
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
* Dimensions (thickness and width) of terminal specified in this catalog is measured before pre-soldering.
Intervals between terminals is measured at A surface level.
Schematic (Bottom view)
30
85
86
87
Including diode type,
including resistor type also available
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CM
REFERENCE DATA
1-(1). Coil temperature rise (12V type)
Sample: CM1F-12V, 3 pcs.
Measured portion: Inside the coil
Contact carrying current: 20A, 35A
Ambient temperature: 85°C 185°F
1-(2). Coil temperature rise (24V type)
Sample: CM1F-24V, 4 pcs.
Measured portion: Inside the coil
Contact carrying current: 0A, 15A
Ambient temperature: 85°C 185°F
2. Max. switching capability (Resistive load,
initial)
12 14 16
120
100
80
60
40
20
0
35A
20A
Coil applied voltage, V
Temperature rise, °C
24 28 32
120
100
80
60
40
20
0
15A
0A
Coil applied voltage, V
Temperature rise, °C
0
Switching current, A
Switching voltage, VDC
60
50
40
30
20
10
01020304050
24V type
12V type
(N.O. side Room temperature)
3. Ambient temperature and operating
temperature range (12V type)
4. Ambient temperature characteristics
(Cold/initial)
5. Distribution of pick-up and drop-out voltage
Sample: CM1F-12V, 100pcs.
0
Ambient temperature, °C
Coil applied voltage, VDC
5
10
15
30
25
20
–40 –20 20 40 60
8085
1000 120
Operation range
Pick-up voltage
(Cold start) 0
Ambient temperature, °C
Ratio against the rated voltage, %V
20
40
60
70
50
30
10
80
–40 –20 20 40 60 800 100
Pick-up voltage
upper limit
Drop-out voltage lower limit
0
30
20
10
40
50
60
70
Voltage, V
Frequency
1.5 2.0 2.5 3.0 3.5 4.5 5.04.0 5.5 6.0 6.5 7.01.0
Pick-up voltage
Drop-out voltage
6. Distribution of operate time
Sample: CM1F-12V, 30pcs.
* Max. 10ms standard (excluding contact bounce)
7. Distribution of release time
Sample: CM1F-12V, 30pcs.
* Max. 10ms standard (excluding contact bounce)
Without diode
0
30
20
10
40
25
15
5
35
Time, ms
Quantity, n
0.5 1 1.5 2 2.5 3.5 4.5345675.5 6.5 0
30
20
10
40
25
15
5
35
Time, ms
Quantity, n
0.5 1 1.5 2 2.5 3.5 4.5345675.5 6.5
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
CM
Cautions regarding the protection element
For Cautions for Use, see Relay Technical Information.
8-(1). Electrical life test (Motor free)
Sample: CM1aF-R-12V, 6pcs.
Load: 16 A 13.5 V DC
Cooling fan motor actual load (free condition)
Switching frequency: (ON:OFF = 2s:6s)
Ambient temperature: Room temperature
Circuit
Change of pick-up and drop-out voltage Change of contact resistance
Cooling fan motor
13.5V
M M
0
No. of operations, × 104
Pick-up and drop-out voltage, V
Max.
Max.
Min.
Min.
2
1
4
6
8
9
7
5
3
10
0102035
Pick-up voltage
Drop-out voltage
0
No. of operations, × 104
Contact resistance, mΩ
Max.
Min.
2
1
4
6
8
9
7
5
3
10
0102035
X
Load current waveform
Inrush current: 85A, Steady current: 18A,
500ms
20A
8-(2). Electrical life test (Halogen lamp load)
Sample: CM1aF-R-12V, 6pcs.
Load: 20A 13.5V DC
Switching frequency: (ON:OFF = 1s:14s)
Ambient temperature: Room temperature
Change of pick-up and drop-out voltage Change of contact resistance
0
No. of operations, × 104
Pick-up and drop-out voltage, V
Max.
Max.
Min.
Min.
2
1
4
6
8
9
7
5
3
10
0510
Pick-up voltage
Drop-out voltage
0
No. of operations, × 104
Contact resistance, mΩ
Max.
Min.
2
1
4
6
8
9
7
5
3
10
0510
X
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
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.
All Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.
