CJ20 series AC contactor is suitable for the power system of AC 50Hz or 60Hz, rated working voltage up to 660V or 1140V and rated working current up to 630A, used to make and break circuit frequently in a far distance, while, it can be combined with thermal relay or electronic protection equipment to form into an electromagnetic starter, to protect the circuit against possible overload. The products are in conformity with such standards as GB 14048. 4 and IEC 60947-4-1.