CJ20 series AC contactor (hereinafter referred to as the contactor), mainly used in AC 50Hz, rated voltage up to 660V (some models to 1140V), power line current to 630A, for remote frequent switch on and off the circuit and control the AC motor is used, and is suitable for and hot on the heels of electrical appliances or electronic protection device composed of electromagnetic starter, overload to protect the circuit or AC motor may occur and open phase. This product line with IEC947-4-1, GB14048.4 standard.