HMCP050K2, Cutler Hammer,Westinghouse,Eaton, Series C, type HMCP, F Frame, 3P, 3PH, 50A, 600V, 65kA@480V, feed-thru, complete with non-interchangeable trip with I - Instantaneous Protection Only, standard line & load side lug terminals, MCP, motor circuit protector, magnetic range 50-500A, motor FLA 11.5-42.1A, magnetic only, molded case circuit breakers