Bolt On Circuit Breaker, 50 Amps, Number of Poles 3, Circuit Breaker Type Shunt Trip, AC Voltage Rating 240VAC, DC Voltage Rating Not Rated, For Use With Siemens Panelboards, Series BQ, Terminal Connection Lug, Max. AIR Rating 10 kA, Frame Size 125A/BQ, Min. Wire Size 8 AWG, Max. Wire Size 6 AWG (Cu), 4 AWG (Al), Length 3.75 In., Width 3.00 In., Depth 3.00 In., Standards UL Listed, CSA Certified, HACR Rated