Square D PowerPact M Molded Case Circuit Breaker, Type MGL, 600 V AC/250 V DC, 600 A, 50/60 Hz Frequency, 18 kA Interrupt, M Frame, Electronic Trip, 300 to 800 A Trip, 3 Pole, 3 ph, Electrical Actuator, Lug Connection, 3/0 AWG to 500 kcmil Wire, 40 deg C, 8.1 in L x 8.3 in W x 12.8 in H Dimensions