Siemens MP115 Type MP-T Circuit Breaker with Insta-Wire, 120/240 V, Non-Interchangeable Trip, Plug-In Mounting

One 1 in space per pole. Will replace American Switch, Westinghouse Type BR, Bryant, Challenger, Sylvania, Crouse-Hinds, Murray, Frank Adams, General Electric (Full size only), General Switch, I-TE, Gould, Montgomery Ward and Sears. UL listed, SWD rated. 120 VAC fluorescent lighting.