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    3V DC Signal Relay, DPDT, 2A

    5 out of 5 based on 1 reviews | Write a review
    Miniature low signal relay at affordable price, optional coil nominal power 200mW/150 mW, coil voltage 3V DC, contact form DPDT, max. switching current 2A, rated load 1A 125VAC/2A 30VDC.
    This product has a minimum quantity of 10
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    Delivery date: 6-12 days

    Buy mini 3V DC signal relay online, contact form DPDT (2C), widely applications in automatic control system.


    • 2A contact switching capability.
    • High sensitive type, coil power is 150mW/200mW.
    • Standard DIP construction terminal.
    • Ultra – small type, gold – plated contacts.
    • Suit for complete machine wave soldering and integral cleaning process.
    • Main applications: Electric power protection, automation, communication.


    Model ATO-SR-FH32DC3V
    Type Standard Type Sensitive Type
    Coil Parameters (23℃) Nominal Voltage DC 3V
    Nominal Power 200mW 150mW
    Pick-up Voltage ≤2.25VDC ≤2.25VDC
    Drop-out Voltage ≥0.15VDC ≥0.15VDC
    Rated Current 66.7mA 50mA
    Coil Resistance 45Ω 60Ω
    Max Voltage DC 3.9V DC 3.9V
    Contact Parameters Contact Form DPDT (2C)
    Contact Resistance (Initial) ≤100mΩ (6VDC 1A)
    Contact Material AgNi + Gold Plating
    Rated Value Rated Load (Resistance Load) 1A 125VAC
    2A 30VDC
    Max. Switching Voltage 250VAC30VDC
    Max. Switching Current 2A
    Max. Switching Capacity 125VA/60W
    Min. Allowing Load 10mV 10μA
    Electrical Performance Insulation Resistance (Initial) 1000mΩ (500VDC)
    Dielectric Strength (Initial) Between Open Contacts 750VAC, 1 min
    Between Coil & Contacts 1500VAC, 1 min
    Operate Time ≤5ms
    Release Time ≤5ms
    Mechanical Performance Shock Resistance Functional 98m/s2(10g)
    Destructive 980m/s2(100g)
    Vibration Resistance 10Hz ~ 55Hz 1.5mm DA
    Endurance Mechanical 1 x 107ops
    Electrical 1A 125VAC 1 x 105ops (ON/OFF=1s/9s)
    2A 30VDC 1 x 105ops (ON/OFF=1s/9s)
    Operate Condition Ambient Temperature -40℃ ~ 85℃
    Humidity 5% to 90%
    Termination PCB (DIP Encapsulation)
    Unit Weight 5g
    Construction Plastic Sealed

    Note: In order to maintain the initial performance parameters of the signal relay, please be careful not to drop it.


    Units: mm

    Dimensions of Low Signal Relay

    Performance curves

    Performance Curves of Low Signal Relay

    Tips: Working principle of signal relay

    Generally, the signal relay is composed of iron core, coil, armature, contact reed. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through it, resulting in electromagnetic effect. Under the action of electromagnetic force, the armature will overcome the tension of the return spring and attract to the iron core, thus driving the moving contact of the armature and the static contact (normally open contact) to attract. When the coil is powered off, the electromagnetic suction will also disappear, and the armature will return to its original position in the spring reactive force, making the moving contact and the original static contact (normally closed contact) release. In this way, it achieves the purpose of conducting and cutting in the circuit.

    Existing reviews of 3V DC Signal Relay, DPDT, 2A
    Exactly as described.
    This 3V DC signal relay is perfect fit did exactly what it supposed to do. Easy to install and works perfectly. I have been running it for about 2 months.
    From: Karlson | Date: 28/06/2022
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