Connecticut Electric UBITB140C UL Classified Circuit Breaker, 1-Pole 40-Amp 1 Pole, 40 Amp Type UBITBC is UL Classified for use in Challenger, General Electric, Murray, Siemens, Thomas & Betts and Westinghouse load centers Requires one 1-inch space Direct replacement for BR140, C140, MP140, Q140, THQL1140, or TB140