能延长接触器寿命，增强接点吸引力，可以有效地消除干扰，防止误动作，保护控制系统及计算机集成电路。
At the two sides of various relays, contactors, and all perceptual load, SCR, add a parallel surge resistance (E-ARC) in the circuit of protection contact to composite a filter, it can effectively absorb the sparks and arcing, so that the whole system can work normally, and also extend the life of contactor, strengthen the attraction contacts, effectively eliminated interfere