Schneider Electric QO320 Plug-On Circuit Breaker

Schneider Electric QO320 is a 20-amp, 3-pole plug-in miniature circuit breaker from the Square D QO family, designed for 120/240-volt AC distribution panels. It delivers a 10 kA interrupting rating and is designed for straightforward plug-in installation in QO panelboards, enabling quick field replacement. A PowerLink variant is available as QO320PL for PowerLink installations. The device is rated for 120/240 V operation with 3 poles and a 20 A capacity, and it uses plug-in mounting. Typical applications include protecting three-phase loads and multi-wire branch circuits in residential, commercial, and light-industrial power distribution.