Siemens AG QF250A NN Miniature Circuit Breaker

Siemens QF250A NN is a 50A, two‑pole ground‑fault circuit interrupter (GFCI) breaker designed for 120/240V systems and intended for plug‑in installation in Siemens Q‑Series load centers. It carries a 10,000‑amp interrupting rating at 240V, providing robust protection against short circuits and ground faults on multiwire circuits. Commonly used in Siemens spa/pool load centers, the QF250A is shown in factory installations and is compatible with panels that accept plug‑in QF/GFCI breakers. Typical applications include feeders for outdoor equipment and hot tubs or other 240V circuits requiring ground‑fault protection.