Square D molded case circuit breakers have current-carrying parts, mechanisms, and trip devices that are contained in a molded case. In the event of an overcurrent, they interrupt the current to prevent electrical damage in high-power applications, like industrial control panels, commercial OEM, and electrical distribution equipment. Agency advantages supply the following brands: ①Allen-Bradley( Rockwell Automation)Series ②Square D(Schneider Electric) Series ③Eaton - Cutler Hammer (Westinghouse )Series ④SIEMENS PLC Series,Siemens CNC system ⑤Eaton moller Series