Schneider Electric QO320 Miniature Circuit Breaker

Schneider Electric QO320 is a 3-pole miniature circuit breaker designed for 120/240 VAC service, rated at 20 amps with a 10 kA short-circuit interrupting capacity. This plug-in device belongs to the QO family and is intended for use in compatible QO load centers and panels to protect three conductors in multi-wire or three-phase circuits. The triple-pole configuration provides simultaneous disconnection of all three conductors in applicable circuits, enabling coordinated protection during fault conditions. Variants in the QO/QOU lineup include the QO320SWN (switch-neutral) and other 3-pole plug-in versions, but the standard QO320 delivers three-pole, 20A protection at 120/240 VAC on a plug-in mount. Widely used in commercial and light-industrial distribution systems, this breaker integrates with Schneider Electric’s broader ecosystem of QO breakers, panels, and accessories.