Schneider Electric’s Square D QOB320VH is a 3-pole, 20 A miniature circuit breaker designed for 120/240 VAC three‑phase service. This bolt‑on, 2‑space device carries a 22 kA interrupt rating (22 kAIC) and is built to protect three‑phase circuits in panelboards, with a conductor range of 4–2/0 AWG aluminum or copper. Part of the QOB family, the QOB320VH combines thermal‑magnetic overcurrent protection with robust, compact mounting for commercial or light industrial electrical installations requiring reliable short‑circuit and overload protection.
