Switching duty rating, 1.2 per pole Duplex type breaker requires 1 per breaker. 120.240 volts, AC.. 10,000 AIC interrupting rating. Thermal magnetic 40 degrees C breakers have rejection tab feature, allows only 42 circuits in the panel in compliance with NEC article 38415. Interchangeable will replace New General Electric, Murray, ITE (except Pushmatic), Bryant, General, American, CrouseHinds, Sylvania, Challenger and Westinghouse Type BR