Suitable for AC or DC 5~400V inductive load (load less than 1000W) to protect relay contacts or thyristors; RC absorption loop, absorbing induced electromotive force of inductive load; There is a varistor to prevent the voltage from fluctuating too much and the current from sticking to the relay contacts.; Provide the anti-interference ability of the circuit; Crimp terminals are adopted to make wiring more convenient.