Schneider Electric QO220 Plug-In Circuit Breaker

Schneider Electric’s Square D QO220 is a 20A, 2-pole plug-in miniature circuit breaker designed for 120/240 VAC circuits. It employs a thermal-magnetic trip mechanism and carries a 10 kA interrupt rating, enabling rapid disconnection on fault conditions across both hot legs of a 240V circuit. As part of the QO family, this device is intended for plug-in mounting in QO load centers and panelboards, providing reliable 2P protection in compatible Square D installations. The QO220 protects a single 240V branch circuit while fitting standard QO mounting footprints, making it a straightforward replacement or addition to existing QO-series panels without requiring a bus or rail modification. In practice, the breaker supports typical residential or light commercial 240V applications that require a dedicated 20A protection device on both conductors, ensuring coordinated operation with other QO components in the same panel.