The Siemens QS2125 is a two‑pole molded‑case main breaker rated for 125 A at 120/240 V, designed to serve as the main disconnect in Siemens Type QS load centers. As a QS main breaker, it provides primary overcurrent protection for feeders and subpanels in residential or multi‑family panels, with a 10 kA interrupt rating. This 2‑pole, 125 A unit is specifically intended for use within Siemens QS‑series panels to reliably protect the entire panel from overload conditions.
