Molded case with non-interchangeable trip. 120/240 Volts ac; 10,000 AIR. 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,Montogomery Ward and Sears. U.L. Listed. HACR rated. This 100 Amp 2 Pole Circuit Breaker is one of many top quality items in our 100 Amp Double department.