Molded case with non-interchangeable trip. Will replace American Switch, Westinghouse Type BR, Bryant, Challenger, Sylvania, Crouse-Hinds, Murray, Frank Adams, General Electric (Full size only), General Switch, I-T-E, Gould, Montgomery Ward and Sears. UL Listed. HACR rated. 120/240 volt AC; 10,000 AIR. 1" per pole (2" total).