Connecticut Electric UBITB245C UL Classified Circuit Breaker, 2-Pole 45-Amp 2 Pole, 45 Amp Type UBITBC is UL Classified for use in Challenger, General Electric, Murray, Siemens, Thomas & Betts and Westinghouse load centers Requires two 1-inch spaces Direct replacement for BR245, C245, MP245, Q245, THQL1245, or TB245