Products with diode inside
are discontinued in 2014.
CM
Automotive micro-ISO relay
CM RELAYS
• Uses international standard ISO
terminal arrangement.
The ISO international standard terminal
arrangement is used.
(plug-in type)
6
.236
9
.354
8
.315
20
.787
FEATURES
15
.591
20
.787
15
.591
22
.866
23
.906
mm
inch
Products to be discontinued.
• 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 type, plug-in type and 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
10
4
N.O.: 35A 14V DC, N.C.: 20A 14V DC
(Flux-resistant type)
Min. 10
5
*12V DC type
TYPICAL APPLICATIONS
• Fan motor
• Heater
• Head lamp
• Air Compressor
• EPS
• ABS
• Blower fan
• Defogger, etc.
SPECIFICATIONS
Contact
Type
Arrangement
Contact material
Initial contact resistance (Initial)
(By voltage drop 6 V DC 1 A)
Contact voltage drop
12 V coil voltage
24 V coil voltage
1 Form A, 1 Form C
Ag alloy (Cadmium free)
Typ. 2 m
Max. N.O.: 0.5 V
(at 35 A 14 V DC)
Max. N.C.: 0.3 V
(at 20 A 14 V DC)
N.O.: 35 A 14 V
DC
N.C.: 20 A 14 V
DC
N.O.: 20 A
(14 V DC,
at 85C
185F)
N.C.: 10 A
(14 V DC,
at 85C
185F)
1 A 12 V DC
Min. 10
6
Flux-resistant type: Min. 10
5
*
1
Sealed type: Min. 5
10
4
Max. N.O.: 0.3 V
(at 15 A 28 V DC)
Max. N.C.: 0.2 V
(at 8 A 28 V DC)
N.O.: 15 A 28 V
DC
N.C.: 8 A 28 V DC
N.O.: 15 A
(28 V DC,
at 85C
185F)
N.C.: 8 A
(28 V DC,
at 85C
185F)
1 A 24 V DC
Conditions for
operation, trans-
port and
storage*
8
(Not
freezing and con-
densing at low
temperature)
Mass
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: 10mA
*
4
Excluding contact bounce time.
*
5
Half-wave pulse of sine wave: 11 ms; detection time: 10
s
*
6
Half-wave pulse of sine wave: 6 ms
*
7
Time of vibration for each direction; X, Y, Z direction: 4 hours
X
Y
Z
Characteristics
Type
Max. operating speed
(at nominal switching capacity)
Initial insulation resistance*
2
Between open
contacts
Initial breakdown
3
voltage*
Between contacts
and coil
Operate time*
4
(at nominal voltage) (at 20C
85F)
Release time*
4
(at nominal voltage) (at 20C
85F)
Shock
resistance
Vibration
resistance
Functional*
5
Destructive*
6
Functional
Destructive*
7
Ambient temp.
24V coil type
12V coil type
15 cpm
Min. 20 M (at 500 V DC)
500 Vrms for 1 min.
500 Vrms for 1 min.
Max. 10 ms (initial)
Max. 10 ms
Max. 15 ms
(with diode) (initial)
Min. 200 m/s
2
{20G}
Min. 1,000m/s
2
{100G}
10 Hz to 500 Hz,
Min. 44.1 m/s
2
{4.5 G}
10 Hz to 2,000 Hz,
Min. 44.1 m/s
2
{4.5 G}
–40C to + 85C
–40F to + 185F
Nominal switch-
ing capacity
Rating
(resistive
load)
Max. carrying
current
Min. switching
capacity
#1
Expected
life
Mechanical
(at 120 cpm)
Electrical
(at rated load)
Humidity
5% R.H. to 85% R.H.
Coil
Nominal operating power
1.5 W
1.8 W
1.7 W
2.0 W
(with resistor inside (with resistor inside
type)
type)
Approx. 20g
.71oz
#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.
*
8
Refer to “6. Usage, Storage and Transport Conditions“ in
AMBIENT
ENVIRONMENT section in Relay Technical Information.
Please inquire if you will be using the relay in a high temperature atmosphere.
ds_61204_en_cm: 030412D
1
CM
ORDERING INFORMATION
CM
1
F
R
Products with diode inside
are discontinued in 2014.
P
12V
Contact arrangement
1a: 1 Form A
1: 1 Form C
Protective construction
Nil: Sealed type
F: Flux-resistant type
Classification of types
Nil: Standard type
D: with diode inside
R: with resistor inside
Mounting classification
Nil: Plug-in type
P: PC board type
(24V type only)
Coil voltage (DC)
12 V
24 V
Note: Bulk package: 50 pcs.; Case: 200 pcs.
D: with diode inside
TYPES
Packing quantity: Inner 50pcs, Outer 200pcs.
Contact arrangement
1 Form A
1 Form C
Contact arrangement
Part No.
CM1a-12V
CM1aF-12V
CM1-12V
CM1F-12V
Part No.
CM1a-24V
CM1aF-24V
CM1a-P-24V
CM1aF-P-24V
CM1-24V
CM1F-24V
CM1-P-24V
CM1F-P-24V
Coil voltage
Mounting classification
Plug-in type
12 V DC
Plug-in type
Coil voltage
Mounting classification
Plug-in type
PC board type
24 V DC
Plug-in type
PC board type
Protective construction
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Protective construction
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
1 Form A
1 Form C
COIL DATA (at 20C
68F)
Nominal voltage,
V DC
12
24
Pick-up voltage,
V DC
3 to 7
6 to 14
Drop-out voltage,
V DC
1.2 to 4.2
2.4 to 8.4
Nominal current,
mA
12510%
7510%
Coil resistance,
ohm
9610%
32010%
Nominal operating
power, W
1.5
1.8
Usable voltage
range, V DC
10 to 16
20 to 32
DIMENSIONS
(mm
inch)
1. Micro-ISO Plug-in type (1 Form C)
CAD Data
CAD
Data
Download
CAD
Data
from our Web site.
Schematic (Bottom view)
85
87a
87
30
22
.866
86
Including diode type,
including resistor type also available
3.25
.128
A*
0.8
.031
4.8
.189
20
3-1.5 dia.
.787
3-.059 dia.
14
.551
8
.315
85
4.25
.167
11
.433
6.3
.248
15
.591
0.8
.031
diode type
2-1.75 dia.
2-.069 dia.
2.1
.083
9
.354
30
87a
86
87
Sealed by 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
* Intervals between terminals is measured at A surface level.
2
ds_61204_en_cm: 030412D
Products with diode inside
CAD Data
are discontinued in 2014.
CM
Schematic (Bottom view)
22
.866
85
87
30
2. Micro-ISO Plug-in type (1 Form A)
3.25
.128
A*
4.8
.189
20
3-1.5 dia.
.787
3-.059 dia.
14
.551
8
.315
85
4.25
.167
11
.433
6.3
.248
15
.591
0.8
.031
86
Including diode type,
including resistor type also available
0.8
.031
2-1.75 dia.
2-.069 dia.
2.1
.083
diode type
mm
inch
9
.354
30
87a
86
87
Sealed by 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
* Intervals between terminals is measured at A surface level.
3. Micro-ISO PC board type (1 Form C)
CAD Data
Schematic (Bottom view)
1
.039
23
.906
85
87a
86
87
30
MAX. 1.2
MAX. .047
Pre-soldering
2.1
4.8
.083
.189
20
.787
15
.591
8
.315
85
0.8
.031
3.5
.138
A*
2.5
.098
0.8
.031
6.3
.248
15
.591
Including diode type,
including resistor type also available
diode type
PC board pattern (Bottom view)
2.4
+0.1
0
.094
+.004
0
+0.1
+0.1
1.4
0
1.4
0
.055
+.004
.055
+.004
0
0
9.0±0.05
.354±.002
4.5±0.05 1.4
+0.1
0
.177±.002 .055
+.004
0
1.4
+0.1
0
.055
+.004
0
15.0±0.05
.591±.002
8.0±0.05
.315±.002
2.1
.083
9
.354
30
87a
86
87
Sealed by 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
2.7
+0.1
0
.106
+.004
0
* Dimensions (thickness and width) of terminal specified in this catalog is measured before pre-soldering.
Intervals between terminals is measured at A surface level.
1.4
+0.1
0
.055
+.004
0
4. Micro-ISO PC board type (1 Form A)
CAD Data
Schematic (Bottom view)
1
.039
23
.906
85
87
30
MAX. 1.2
MAX. .047
Pre-soldering
2.1
4.8
.083
.189
20
.787
15
.591
8
.315
85
0.8
.031
3.5
.138
A*
2.5
.098
0.8
.031
6.3
.248
15
.591
86
Including diode type,
including resistor type also available
diode type
2.1
.083
9
.354
30
87a
86
87
Sealed by 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
* Dimensions (thickness and width) of terminal specified in this catalog is measured before pre-soldering.
Intervals between terminals is measured at A surface level.
ds_61204_en_cm: 030412D
3
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: 85C
185F
120
35A
Temperature rise,
°C
Temperature rise,
°C
100
80
60
40
20
0
100
80
60
40
20
0
20A
Products with diode inside
1-(2). Coil temperature rise (24V type)
Sample: CM1F-24V, 4 pcs.
Measured portion: Inside the coil
Contact carrying current: 0A, 15A
Ambient temperature: 85C
185F
120
Switching voltage, VDC
are discontinued in 2014.
2. Max. switching capability (Resistive load,
initial)
60
50
40
30
20
10
0
(N.O. side Room temperature)
24V type
12V type
15A
0A
12
14
16
Coil applied voltage, V
24
28
32
Coil applied voltage, V
0
10
20
30
40
50
Switching current, A
3. Ambient temperature and operating
temperature range (12V type)
30
Coil applied voltage, VDC
25
20
15
10
5
0
−40 −20
Pick-up voltage
(Cold start)
0
20 40 60 8085 100 120
Ambient temperature,
°C
4. Ambient temperature characteristics
(Cold/initial)
Ratio against the rated voltage, %V
80
70
60
50
40
30
20
Drop-out voltage lower limit
10
0
−40 −20
0
20
40
60
80 100
Pick-up voltage
upper limit
5. Distribution of pick-up and drop-out voltage
Sample: CM1F-12V, 100pcs.
70
60
Frequency
50
40
30
20
10
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
Voltage, V
Pick-up voltage
Drop-out voltage
Operation range
Ambient temperature,
°C
6. Distribution of operate time
Sample: CM1F-12V, 30pcs.
* Max. 10ms standard (excluding contact bounce)
40
35
30
Quantity, n
25
20
15
10
5
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Time, ms
7. Distribution of release time
Sample: CM1F-12V, 30pcs.
* Max. 10ms standard (excluding contact bounce)
Without diode
40
35
30
Quantity, n
25
20
15
10
5
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Time, ms
4
ds_61204_en_cm: 030412D
Products with diode inside
8-(1). Electrical life test (Motor free)
are discontinued in 2014.
Change of pick-up and drop-out voltage
10
Pick-up and drop-out voltage, V
9
8
7
6
5
4
3
2
1
Drop-out voltage
Max.
Min.
Pick-up voltage
Max.
Min.
Contact resistance, mΩ
CM
Change of contact resistance
10
9
8
7
6
5
4
3
2
1
Max.
X
Min.
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
M
13.5V
M
Cooling fan motor
0
0
10
20
35
0
0
10
20
35
No. of operations,
×
10
4
No. of operations,
×
10
4
Load current waveform
Inrush current: 85A, Steady current: 18A,
20A
500ms
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
Pick-up and drop-out voltage, V
10
9
8
7
6
5
4
3
2
1
00
5
No. of operations,
×
10
4
Change of contact resistance
10
9
Contact resistance, mΩ
8
7
6
5
4
3
2
1
Max.
X
Min.
Pick-up voltage
Max.
Min.
Drop-out voltage
Max.
Min.
10
0
0
5
No. of operations,
×
10
4
10
Cautions regarding the protection element
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.
For Cautions for Use, see
Relay Technical Information.
ds_61204_en_cm: 030412D
5
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