Square D™ QO™ Main Breaker Load Center, 1-Phase Convertible, 120/240 VAC, 100 A, 50/60 Hz, 22 kA Interrupt, 12 Circuits, 3-Wire Wiring Configuration, 125 A Bus, 6 Spaces, 4 to 2/0 AWG Al/Cu Wire, NEMA 3R, 3R Enclosure Box, Galvannealed Steel Housing, 18.92 in H x 14.75 in W x 4.52 in D