The Schneider Electric QOB340VH1021 is a 40 A, 3-pole molded‑case circuit breaker in the Square D QOB family, rated for 120/240 VAC with a 22 kA interrupting rating. This bolt‑on device features a plug‑on neutral design and a compact footprint for faster installations, and it is listed as a QOB miniature circuit breaker with AC shunt capability. The model number identifies a 3‑pole, 40 A unit intended to protect multi‑wire branch circuits in distribution panels that accept QOB breakers.
