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High Sensitive Bifurcated Contact Signal Relay

High Sensitive Bifurcated Contact Signal Relay

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● High sensitivity : 0.15mW nominal power consumption
● Conforms to FCC Part 68 1500V Surge and Dielectric 1000VAC
● Fully sealed for immersion cleaning
● RoHS Compliant

Model: M4

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Product Description

Forward Relay is China manufacturer & supplier who mainly produces High Sensitive Bifurcated Contact Signal Relay with many years of experience. Hope to build business relationship with you.


DIL pitch terminals. High sensitivity.

Conforms to FCC Part 68 1.5kV surge and dielectric 1000VAC.

High reliability bifurcated contact.

Application for telecommunication equipment, office equipment, security alarm systems, measuring instruments, medical monitoring equipment, audio visual equipment, flight simulator, sensor control.

Ordering Information

1 Part number: M4

2 Coil rated voltage:  DC:3:3V 5:5V 6:6V 9:9V; 12:12V 24:24V 48:48V

3 Enclosure H: Wash tight

4 Contact material Nil: AgPd W: AgNi

5 Nominal coil power Nil:0.15W A:0.2W

Contact Data

Contact Arrangement 2C(DPDT(B-M)) (Bifurcated Crossbar)
Contact Material AgPd( Au plated ) AgNi(Au plated)
Contact Rating (Resistive) 1A/24VDC; 2A/30VDC; 0.5A/120VAC
Max. Switching Power 60W 125VA
Min. Switching Load 0.01mA/10mV(Reference Value)
Max. Switching Voltage 220VDC 250VAC
Max. Swit ching Current:2A
Contact Resistance ≤50mΩ
Item 4.12 of IEC 61810-7
Operation Life Electrical 1A/24VDC:5×105 (Ag Ni 1×105 )
2A/30VDC 1×105
Item 4.30 of IEC 61810-7
Mechanical 1×108
Item 4.31 of IEC 61810-7


Relays previously tested or used above 10mA resistive at 6V maximum DC or peak AC open circuit are not recommended for subsequent use in low level applications.

Coil Parameter

Dash numbers Coil voltage VDC Coil resistance
Ω ± 10%
Pick-up voltage VDC(max) (75%of rated voltage ) Drop-out voltage VDC(min) (10% of rated voltage) Coil power W Operate time ms Release time ms
Rated Max.
M4-003 3 7.5 60 2.1 0.15 0.15 Approx.4.5 Approx.1.5
M4-005 5 12.5  167 3.5 0.25 0.15
M4-006 6 15.0 240 4.2 0.3 0.15
M4-009 9 22.5 540 6.3 0.45 0.15
M4-012 12 30.0 960 8.4 0.6 0.15
M4-024 24 52.9 3840 16.8 1.2 0.15
M4-048 48 84.9 7680 33.6 2.4 0.30
M4-003A 3 6.5 45 2.1 0.3 0.2 Approx.4.5 Approx.1.5
M4-005A 5 10.8 125 3.5 0.5 0.2
M4-006A 6 13.0 180 4.2 0.6 0.2
M4-009A 9 19.5 405 6.3 0.9 0.2
M4-012A 12 26.5 720 8.4 1.2 0.2
M4-024A 24 52.9 2880 16.8 2.4 0.2
M4-048A 48 103.9 11520 33.6 4.8 0.2


1.The use of any coil voltage less than the rated coil voltage will compromise the operation of the relay.

2.Pickup and release voltage are for test purposes only and are not to be used as design criteria.

3.Unless otherwise stated, the rated coil voltage specified in coil parameter table shall be used for all tests and its application to the relay.


Electrostatic Capacitance
Between Open Contacts Approx.0.7pF item 4.41 of IEC 61810-7
Between Coil & Contacts Approx.1.0pF item4.41 of IEC 61810-7
Between Contact Poles Approx.0.9pF item4.41 of IEC 61810-7
Insulation Resistance 1000M Ω min(at 500VDC) Item 4.11 of IEC 61810-7
Dielectric Strength
Between Open Contacts 1000VAC 1min Item4.9 of IEC 61810-7
Between Coil & Contacts 1000VAC 1min
Between Contact Poles 1000VAC 1min
Surge Withstand Voltage
Between Open Contacts 1500V FCC68
Between Coil & Contacts 1500V
Between Contact Poles 1500V
Shock Resistance Functional: 98m/s2 11 ms;
Destructive:980 m/s2 6ms
Item 4.26 of IEC 61810-7
Vibration Resistance 10Hz~ 55Hz Double amplitude
Functional: 3mm Destructive: 5mm
Item 4.28 of IEC 61810-7
Terminals Strength 5N Item 4.24 of IEC 61810-7
Temperature Range -40℃~65℃(-40° F~149° F)
(-40℃ ~70℃ for 0.4W Coil)
Mass Approx. 4.8g Item 4.7 of IEC 61810-7

Safety Approvals

Safety approval UL&CUR TUV
Load 20A/30VDC;1A/24VDC; 0.5A/120VAC 1A/24VDC; 0.5A/120VAC



In case of no tolerance shown in outline dimension: outline dimension ≤1mm tolerance should be ±0.2mm outline dimension >1mm and ≤5mm, tolerance should be ±0.3mm; outline dimension >5mm, tolerance should be ±0.4mm.

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