Products with diode inside
CM
are discontinued in 2014.
Automotive micro-ISO relay
20
.787
FEATURES
15
.591
20
.787
• 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. 5 104
N.O.: 35A 14V DC, N.C.: 20A 14V DC
(Flux-resistant type)
Min. 105 *12V DC type
15
.591
22
.866
23
.906
mm inch
Products to be discontinued.
CM RELAYS
• Uses international standard ISO
terminal arrangement.
The ISO international standard terminal
arrangement is used.
(plug-in type)
6
.236
8
.315
9
.354
TYPICAL APPLICATIONS
• Fan motor
• Heater
• Head lamp
• Air Compressor
• EPS
• ABS
• Blower fan
• Defogger, etc.
SPECIFICATIONS
Contact
Characteristics
Type
Arrangement
Contact material
Initial contact resistance (Initial)
(By voltage drop 6 V DC 1 A)
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)
Contact voltage drop
Nominal switching capacity
Rating
(resistive
load)
Expected
life
Max. carrying
current
Min. switching
capacity#1
Mechanical
(at 120 cpm)
Electrical
(at rated load)
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 12 V DC
Release time*4
(at nominal voltage) (at 20C 85F)
Functional*5
Destructive*6
Shock
resistance
Functional
Vibration
resistance
Destructive*7
1 A 24 V DC
Min. 106
Flux-resistant type: Min. 105*1
Sealed type: Min. 5 104
Coil
Nominal operating power
Type
Max. operating speed
(at nominal switching capacity)
Initial insulation resistance*2
Between open
contacts
Initial breakdown
voltage*3
Between contacts
and coil
Operate time*4
(at nominal voltage) (at 20C 85F)
1.5 W
1.8 W
1.7 W
2.0 W
(with resistor inside (with resistor inside
type)
type)
#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.
Conditions for
operation, transport and
storage*8 (Not
freezing and condensing at low
temperature)
Mass
Ambient temp.
Humidity
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/s2 {20G}
Min. 1,000m/s2 {100G}
10 Hz to 500 Hz,
Min. 44.1 m/s2 {4.5 G}
10 Hz to 2,000 Hz,
Min. 44.1 m/s2 {4.5 G}
–40C to + 85C
–40F to + 185F
5% R.H. to 85% R.H.
Approx. 20g .71oz
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
*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
Products with diode inside
are discontinued in 2014.
ORDERING INFORMATION
CM
1
F
Contact arrangement
Protective construction
1a: 1 Form A
1: 1 Form C
Nil: Sealed type
F: Flux-resistant type
R
Classification of types
Nil: Standard type
D: with diode inside
R: with resistor inside
P
12V
Mounting classification
Coil voltage (DC)
Nil: Plug-in type
P: PC board type
(24V type only)
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
1 Form A
1 Form C
Part No.
CM1a-12V
CM1aF-12V
CM1-12V
CM1F-12V
Coil voltage
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
Protective construction
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Plug-in type
12 V DC
Plug-in type
Mounting classification
Protective construction
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Sealed type
Flux-resistant type
Plug-in type
PC board type
24 V DC
Plug-in type
PC board type
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%
DIMENSIONS(mm inch)
Nominal operating
power, W
1.5
1.8
Usable voltage
range, V DC
10 to 16
20 to 32
CAD Data
Data from our Web site.
Download CAD
1. Micro-ISO Plug-in type (1 Form C)
Schematic (Bottom view)
CAD Data
85
87
30
87a
22
.866
86
Including diode type,
including resistor type also available
4.25
.167 11
.433
3.25
.128
A*
0.8
.031
4.8
.189 20
3-1.5 dia. .787
3-.059 dia. 14
.551
8
.315
2-1.75 dia.
2-.069 dia.
2.1
.083
6.3
.248
15
.591
diode type
0.8
.031
85
9
.354
30
87a
87
86
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
CM
are discontinued in 2014.
2. Micro-ISO Plug-in type (1 Form A)
CAD Data
Schematic (Bottom view)
85
22
.866
A*
0.8
.031
4.8
.189 20
3-1.5 dia. .787
3-.059 dia.
14
.551
8
.315
2.1
.083
85
87a
diode type
mm inch
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
30
9
.354
Including diode type,
including resistor type also available
0.8
.031
6.3
.248
15
.591
2-1.75 dia.
2-.069 dia.
30
86
4.25
.167 11
.433
3.25
.128
87
87
86
Sealed by epoxy resin
* Intervals between terminals is measured at A surface level.
3. Micro-ISO PC board type (1 Form C)
CAD Data
Schematic (Bottom view)
85
23
.906
1
.039
MAX. 1.2
MAX. .047
87
30
87a
86
Pre-soldering
2.1
4.8 .083
.189 20
.787
15
.591
8
.315
3.5
.138
0.8
.031
A*
2.5
.098
2.1
.083
0.8
.031
diode type
6.3
.248
15
.591
PC board pattern (Bottom view)
85
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
30
9
.354
87a
87
86
Sealed by epoxy resin
Including diode type,
including resistor type also available
* Dimensions (thickness and width) of terminal specified in this catalog is measured before pre-soldering.
Intervals between terminals is measured at A surface level.
2.4+0.1
0
.094+.004
0
1.4+0.1
1.4+0.1
0
0
+.004
.055 0 .055+.004
0
15.0±0.05
.591±.002
8.0±0.05
.315±.002
2.7+0.1
0
.106+.004
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
1.4+0.1
0
.055+.004
0
4. Micro-ISO PC board type (1 Form A)
CAD Data
Schematic (Bottom view)
23
.906
1
.039
MAX. 1.2
MAX. .047
Pre-soldering
2.1
4.8 .083
.189 20
.787
15
.591
8
.315
85
30
9
.354
87a
3.5
.138
0.8
.031
87
86
Sealed by epoxy resin
A*
2.5
.098
2.1
.083
0.8
.031
6.3
.248
15
.591
85
87
30
86
Including diode type,
including resistor type also available
diode type
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
Products with diode inside
are discontinued in 2014.
REFERENCE DATA
1-(1). Coil temperature rise (12V type)
1-(2). Coil temperature rise (24V type)
Sample: CM1F-12V, 3 pcs.
Measured portion: Inside the coil
Contact carrying current: 20A, 35A
Ambient temperature: 85C 185F
Sample: CM1F-24V, 4 pcs.
Measured portion: Inside the coil
Contact carrying current: 0A, 15A
Ambient temperature: 85C 185F
120
2. Max. switching capability (Resistive load,
initial)
120
(N.O. side Room temperature)
60
24V type
12V type
20A
60
40
20
15A
0A
60
40
30
25
20
Operation range
15
10
5
0
−40 −20
0
14
16
Coil applied voltage, V
0
24
70
60
50
40
30
40
50
Pick-up voltage
Drop-out voltage
50
40
30
20
20
Drop-out voltage lower limit
0
−40 −20
10
0
20
40
60
80 100
Ambient temperature, °C
40
40
35
35
30
30
Quantity, n
Quantity, n
4
20
30
Sample: CM1F-12V, 30pcs.
* Max. 10ms standard (excluding contact bounce)
Without diode
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
25
20
15
15
10
10
5
5
Time, ms
10
Sample: CM1F-12V, 100pcs.
60
7. Distribution of release time
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
0
70
Sample: CM1F-12V, 30pcs.
* Max. 10ms standard (excluding contact bounce)
20
20
5. Distribution of pick-up and drop-out voltage
Pick-up voltage
upper limit
6. Distribution of operate time
25
30
Switching current, A
80
10
20 40 60 8085 100 120
Ambient temperature, °C
40
0
28
32
Coil applied voltage, V
4. Ambient temperature characteristics
(Cold/initial)
Pick-up voltage
(Cold start)
50
10
Frequency
12
3. Ambient temperature and operating
temperature range (12V type)
Coil applied voltage, VDC
80
20
Ratio against the rated voltage, %V
0
100
Switching voltage, VDC
80
Temperature rise, °C
Temperature rise, °C
35A
100
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Time, ms
ds_61204_en_cm: 030412D
CM
are discontinued in 2014.
Change of pick-up and drop-out voltage
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
M
13.5V
Change of contact resistance
10
10
9
9
Contact resistance, mΩ
8-(1). Electrical life test (Motor free)
Pick-up and drop-out voltage, V
Products with diode inside
8
7
6
Pick-up voltage
Max.
Min.
5
4
Drop-out voltage
3
Max.
Min.
2
7
6
5
4
3
Max.
X
Min.
2
1
0
Cooling fan motor
8
1
0
10
20
No. of operations, × 10
0
35
0
10
20
35
No. of operations, × 104
4
Load current waveform
Inrush current: 85A, Steady current: 18A,
20A
500ms
Change of pick-up and drop-out voltage
Change of contact resistance
10
10
9
9
Contact resistance, mΩ
Sample: CM1aF-R-12V, 6pcs.
Load: 20A 13.5V DC
Switching frequency: (ON:OFF = 1s:14s)
Ambient temperature: Room temperature
Pick-up and drop-out voltage, V
8-(2). Electrical life test (Halogen lamp load)
8
7
6
Pick-up voltage
Max.
5
Min.
4
3
Drop-out voltage
2
Max.
Min.
7
6
5
4
Max.
3
X
Min.
2
1
00
8
1
5
0
10
No. of operations, × 104
0
5
10
No. of operations, × 104
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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