Miniature Circuit Breaker, Amps 100 A, AC Voltage Rating 277/480V AC, Circuit Breaker Type Standard, Number of Poles 3, DC Voltage Rating 125/250V DC, Circuit Breaker Actuator Toggle, Circuit Breaker Mounting Style Bolt On, Compatible Panelboard/Load Center Series NF, Phase Three, Series EDB, Max. AIR Rating 18kA at 277/480V AC, For Use With Square D NF Panelboards, Terminal Connection Lug, Frame Size 125A/EDB, Length 5.66 in, Width 2.94 in, Depth 4.05 in, Max. Operating Temp. 104 Degrees F