Square D LH automatic molded case switches offer a disconnect point that allows for normal operating openings and closings, while also protecting the switch from high fault currents by instantly opening at a factory preset magnetic trip point. This 3 pole unit mount, rated for 400A and 600VAC, features lugs and includes a Visi-Blade suffix to allow viewing contact positions, meeting standards such as UL, CSA, ANCE, and IEC.