Miniature Circuit Breaker, Amps 20 A, AC Voltage Rating 120/240V AC, Circuit Breaker Type Shunt Trip, Number of Poles 1, DC Voltage Rating Not Rated, Circuit Breaker Actuator Toggle, Circuit Breaker Mounting Style Bolt On, Compatible Panelboard/Load Center Series P1, Phase Single, Series BL, Max. AIR Rating 22kA at 120V AC, For Use With Siemens P1 Panelboards, Terminal Connection Lug, Frame Size 125A/BLH, Length 3.8 in, Width 4.4 in, Depth 5.5 in, Min. Wire Size 12 AWG (Al), 14 AWG (Cu)