Protect a breaker panel in a load center with this Square D by Schneider Electric QOM1 frame size 100 Amp Double-Pole Main Breaker. Used for overload and short-circuit protection of your electrical system, this breaker is compatible with both Square D QO and Homeline load centers, CSED devices and NQOD panel boards rated for 100 - 125 Amp. It accepts aluminum or copper #12 - 2/0 AWG feeder wire. To ensure safety, it is both UL listed and ANSI certified. The ANSI-certified and UL-listed unit is rated for 120/240 VAC and 22,000 AIR.