SPNO, SPDT, DPNO, & DPDT General Purpose Switching Relay

spno Hartland Controls Littelfuse HCR-5 SPNO and SPDT General Purpose Switching Relays are used in applications such as HVAC systems, standby power supplies, and telephone. Hartland Controls Littelfuse HCR-5 SPNO and SPDT General Purpose Switching Relays are used in applications such as HVAC systems, standby power supplies, and telephone

spno, SPNO, SPDT, DPNO, & DPDT General Purpose Switching Relay Relays control circuits through a low-power snal. An electro-magnetic current actuates the relay, creating a closed circuit.