HFD4/5 signal relay is a relay product with stable performance and wide application, suitable for a variety of automation control circuit scenarios.

Basic properties
Model: HFD4/5.
Package specification: DIP-8.

Electrical characteristics
1. Coil voltage: usually 5VDC
2. Coil resistance: 178Ω.
3. Coil power: 140mW.
3. Contact form: DPDT (double-pole double-throw).
4. Contact material: The contact material is silver palladium (AgPd) and gold (Au).
5. Rated contact current: 2A.
6. Switching voltage: 250VAC/220VDC.
7. Surge voltage between coil and contact: 2.5kV.

Physical characteristics
1. Size: 10.00mm long, 6.50mm wide
2. Number of pins: 8Pin.
3. Operating temperature range: -40℃+85℃

Other features
1. Action time: usually instantaneous action.
2. Release time: 3ms.
3. Application type: control relay.
4. Working principle: electromagnetic relay.
5. Output form: contact type.
6. Protection feature: closed type.
7. Power: medium power relay.

 HFD4/5 signal relay is usually used in automated control circuits. As an “automatic switch” for small current to control large current operation, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.