Product details:

Circuit breaker, bolt on, air rating 14ka, standard circuit breaker type, number of poles 3, voltage 277/480vac, 40 amps, 3 phase, any phase connection, min wire size 10 awg, max wire size 4 awg, length 5. 25 In, width 3. 00 In, depth 3. 06 In, box lug terminal connection, for use with ge ae lighting panels, frame size tey, high amp trip setting 1200 fixed, standards ul/ csa tey bolt-on circuit breakersmolded-case breakers for use in 1in pole spacings in 480/277v ae lighting panels.1-pole 277vac; 2and 3-pole 277/480vac 14k air screw clamp connection up to 30a; box lug connection 35a and higher.