Siemens Q120 QP Circuit Breaker

Siemens Q120 QP Circuit Breaker is a 1-pole, 120V, 20A plug‑in protective device from Siemens’ Type QP family, designed to safeguard a single residential branch circuit in compatible load centers. It employs a thermal‑magnetic trip mechanism to interrupt fault currents and carries an interrupting rating of 10,000 A at 120V. The compact 1‑pole form factor and plug‑in mounting make it a common replacement for lighting, receptacle, and other standard 120V circuits within Siemens panels that accept QP breakers. As part of the QP line, the Q120 is the straightforward non‑GFCI, non‑AFCI option in this class, offering reliable overcurrent protection without additional sensing features. The QP family is widely supported in residential installations, with the 20A/1P configuration being a staple for protecting individual branch circuits in standard homes. Use this breaker to replace a failed or tripping 20A 1P unit in compatible Siemens load centers, ensuring continued protection of your 120V circuits while maintaining panel compatibility and shared electrical protection.