EATON Cutler-Hammer Series molded case circuit breaker accessory handle mechanism, Universal rotary through-the-door handle mechanism, JG-Frame, Black, Series C, 12 in.Electrical Sector under thebrand offers the widest variety of molded case circuit breakers available today. Designed for electrical and machinery OEMs serving a range of industries and applications these proven designs incorporate the latest in innovation with the high reliability that has been our hallmark since the advent of the circuit breaker in the 1920s.