Miniature Circuit Breaker, Amps 40 A, AC Voltage Rating 120V AC, Circuit Breaker Type High Intensity Discharge, Number of Poles 1, DC Voltage Rating Not Rated, Circuit Breaker Actuator Paddle, Circuit Breaker Mounting Style Plug In, Compatible Panelboard/Load Center Series QO, Phase Single, Series QO, Max. AIR Rating 10kA at 120/240V AC, For Use With QO Load Centers and NQ Panelboards, Terminal Connection Lug, Frame Size 100A/QO, Length 3.12 in, Width 0.75 in, Depth 2.91 in, Min. Wire Size 8 AWG