Schneider Electric QOB350 Bolt-On Circuit Breaker

Schneider Electric QOB350 is a 50 A, 3-pole bolt-on miniature circuit breaker in the QOB family, rated for 120/240 VAC with a 10 kA interrupt rating. This bolt-on device is designed for use in QOB load centers and other approved three‑phase panel configurations, delivering common-trip protection for three‑phase circuits up to 50 A. It accepts copper or aluminum conductors in the 8 AWG to 2 AWG range and employs a thermal‑magnetic trip mechanism for reliable overcurrent protection. The QOB350’s bolt‑on mounting and 3P construction make it a drop‑in protection solution for Schneider Electric’s QOB line of panelboards and compatible QOB installations. Suitable for protecting motors, pumps, compressors, and other 3‑phase loads in distribution systems, this breaker provides precise, code‑compliant overcurrent protection where bolt‑on installation is required. In a standard 3‑pole configuration, trip of any pole clears all poles, ensuring coordinated protection across the entire circuit.