Product Description: The Square D MEF436LSIG is a Molded Case Circuit Breaker from the Pre-Micrologic family. It features 3 poles, 600V voltage, and a 400 amp rating with a 100kA@480V AIC rating. This bolt-on breaker includes solid-state protection and LSIG functions for long-time, short-time, instantaneous, and ground fault protection. Lugs are not included with this unit.