Schneider Electric's Square D QO3100 is a three-pole, 100-amp miniature circuit breaker designed for plug-in mounting in QO panelboards. It operates on 120/240 V AC with a 10 kA interrupt rating, delivering thermal-magnetic overcurrent protection for three‑phase circuits in residential and light commercial distributions. This standard-trip, QO-series breaker is built for quick replacement in compatible Square D/QO panels and is suitable for feeders and branch circuits up to 100 A.
