Siemens Q2125H Miniature Circuit Breaker

Siemens Q2125H is a two-pole, 125 A miniature molded‑case circuit breaker engineered for 120/240 V circuits in residential and light commercial distribution panels. It uses a thermal‑magnetic trip mechanism to interrupt current during overloads and short circuits, delivering a 22 kA interrupt rating at 240 V and UL 489 listing to meet standard overcurrent protection requirements. The device features Insta-Wire termination for fast, secure wiring and mounts as a plug‑in QP/MP style unit within Siemens load centers and panelboards, with molded‑case construction that helps withstand typical electrical environments. This Q2125H is suited for branch circuits feeding outlets, lighting, and other 120/240 V loads, as well as feeders from main distribution panels and subpanels, providing protection for circuits up to 125 A in both new installations and upgrades. The 2‑pole design ensures simultaneous disconnection of both ungrounded conductors on multiwire circuits, enhancing safety and simplifying code compliance in typical residential or light commercial electrical layouts.