Is mainly used for AC 50/60 hz rated voltage 690 v, dc voltage to 500 v, under the use of 3/415 v AC - category, rated current 630 a circuit, for remote connected and staging circuit, and with the appropriate composition of thermal overload relay electromagnetic starter circuit may occur in order to protect the overload operation, contactor is appropriate and should be numerous to start after AC dc motor control.The contactor can be equipped with side mounted auxiliary contact, top mounted auxiliary contact, delay module, mechanical interlocking module and other auxiliary accessories.The product conforms to the standard IEC60947-4-1.