Siemens Q350 Miniature Circuit Breaker

Siemens Q350 is a 50 A, 3-pole, plug-on miniature circuit breaker (QP type) rated for 120/240 V AC with a 10 kA interrupt capacity, designed to protect three‑phase branch circuits in residential and light commercial panels. As part of the SENTRON QP family, it installs in standard QP enclosures and uses a thermal-magnetic trip mechanism to disconnect on overcurrent conditions, delivering reliable protection for motors, pumps, lighting, and other three-phase loads. The Q350 variant is commonly equipped with Insta-Wire termination for quicker field wiring and reduced labor during panel assembly, while still offering the same plug-on compatibility and interchangeability within the QP lineup. This 3P 50 A device is suitable for use wherever three‑phase protection is required in a compact, modular format, and it supports the 10 kA interrupt rating typical of the QP series.