Schneider Electric QOUR340 Circuit Breaker

Schneider Electric QOUR340 is a 40 A, 3-pole miniature circuit breaker designed for 240 V AC distribution, part of Schneider Electric’s Square D QO/QOU family. This thermal-magnetic device provides overcurrent protection with a typical 10 kA short-circuit rating and UL 489 listing, making it suitable for protecting three‑phase feeders and branch circuits in panels and OEM equipment. It includes a visual trip indicator (Visi-Trip) to clearly show when the breaker has tripped, aiding rapid fault diagnosis in three-phase installations. Used in commercial and industrial electrical systems where compact, reliable three‑pole protection is required.