Molded Case Circuit Breaker, 40 A Amps, AC Voltage Rating 600V AC, Max. AIR Rating 65kA at 240V AC, For Use With I Line Panelboards, Series HG, High Amp Trip Setting 850 A, Low Amp Trip Setting 400 A, Circuit Breaker Type Standard, Number of Poles 2, DC Voltage Rating 250/500/600V DC, Terminal Connection Lug, Trip Type Thermal Magnetic, Phase Single, Instantaneous Trip Fixed, Phase Connection AC, Frame Size 150A/HG, Circuit Breaker Mounting Style I-Line, Height 9.73 in, Width 2.94 in