INTERCHANGEABLE SINGLE POLE CIRCUIT BREAKER 1" 50 amp, 120/240 vac Interchangeable Not interchangeable with Square D Homeline panels 10,000 AIR Switch indicator Plug-in Fits (Gould/ITE/Siemens)-QP, (Crouse Hinds/Murray)-MP, General Electric-THQL, (Sylvania/Challenger)-C, Thomas and Betts-TB and (Bryant/Westinghouse)-BR panels Standard overload and short circuit protection in load centers UL classified as interchangeable UL listed C.S.A. approved HACR rated