Siemens NSB QF115 Miniature Circuit Breaker

Siemens NSB QF115 is a single-pole, 15-amp GFCI miniature circuit breaker designed for 120-volt AC circuits. It plugs into Siemens load centers that accept the QPF2 frame, delivering ground-fault protection for individual branch circuits and outlets while providing standard overcurrent protection. With a 10,000-ampere interrupting capacity (10 kAIC) at 120/240 VAC, this 1-pole QF series breaker is suited for residential and light commercial panels that accept plug-in breakers. The NSB QF115 variant is documented in Siemens catalogs and distributor listings as the 15 A, 120 V GFCI option in the QF family, commonly used to protect circuits such as lighting, receptacles, and other 120 V loads where ground-fault protection is required or recommended by code.