Schneider Electric Square D QO2100 Circuit Breaker

Schneider Electric's Square D QO2100 is a 100-amp, two-pole miniature circuit breaker designed for 120/240-volt AC service in residential panels. Its plug-on (plug‑in) design slots into standard Square D QO load centers, delivering reliable overload and short-circuit protection with a 10,000-ampere interrupting rating. As a Type QO breaker and part of the Square D QO family, the QO2100 is intended for branch-circuit protection in homes and light commercial installations, and it accepts copper or aluminum conductors in common residential sizes. Typical listings indicate compatibility with copper or aluminum conductors from #12 AWG up to #2/0 AWG, providing flexibility for a range of wiring configurations. The device is commonly used in replacement installations to restore proper 100-A protection in existing QO panels, and is widely available through Schneider Electric’s distribution network and major retailers. With two poles and a plug-in design, it provides the standard safety features required for protecting feeders and branch circuits on 120/240-V systems.