25 in, Depth 2.5 in, Width 2.Miniature Circuit Breaker, 80 A, 120/240V AC, 3 Pole, Bolt On Mounting Style, QOB Series AIR Rating 22kA at 120/240V AC, For Use With Square D NQOD Panelboards, Terminal Connection Lug, Frame Size 100A/QO, Length 3.91 in.