Siemens Q350H Bolt-In Circuit Breaker 120/240 VAC

The Siemens Q350H is a 3-pole bolt-in circuit breaker from the QPH family, designed for 120/240 V AC service and rated at 50 A to protect multiwire and three-pole loads in compatible Siemens panels, delivering secure, code-compliant fault protection for residential and light-commercial distributions. Featuring a thermal-magnetic trip unit, it provides reliable overcurrent protection and offers a maximum short-circuit current rating up to 22 kA RMS at 120/240 VAC, with the actual interrupt rating depending on panel configuration, main breaker selection, and the other breakers installed. Built for bolt-in mounting, the Q350H requires a QPH frame panel and supports common-trip operation across all three poles, making it suitable for branch circuits, feeders, and mains within Siemens distribution systems. Typical use cases include protecting large 120/240 V loads in Siemens load centers that accept QPH bolt-in breakers, allowing coordinated protection with the rest of the Siemens electrical distribution ecosystem.