Bolt On Circuit Breaker, 40 Amps, Number of Poles 2, Circuit Breaker Type Shunt Trip, AC Voltage Rating 120/240VAC, 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 2.00 In., Depth 3.00 In., Standards UL Listed, CSA Certified, HACR Rated