China High Quality Automotive DC12V 24V Relay 100A 5pin Spdt Car Control Device Auto Relays

Product description

A relay is both a control switch and a control object (actuator). Taking the fuel pump relay as an example, it is the control switch of the fuel pump, but the coil of the fuel pump relay can only form a circuit through the grounding point of the electronic control unit when the driving transistor is conductive in the electronic control unit.