Square D™ QO® Main Breaker Loadcenter, 1-Phase Convertible Neutral, 120/240 VAC, 200 A, 1 Pole, 50/60 Hz Frequency, 22 kA Interrupt, 54 Circuits, QO Breaker, Panel Breaker Mounting, 3-Wire Wiring Configuration, 54 Spaces, 4 AWG to 250 kcmil Wire, Surface/Plug-On Mounting, NEMA 1 Enclosure, 12 Enclosure Box, Steel Housing Material, 14.25 in W x 3.75 in D x 39.37 in H Dimensions