Product Description: The Square D MXL36450G is a Molded Case Circuit Breaker from the Micrologic family. It features a 3-pole design with a 600V, 450A rating and a 65kA@480V AIC rating. This breaker uses a Feed-Thru connection and includes solid-state protection with LSIG functions (Long-Time, Short-Time, Instantaneous, and Ground Fault).