Siemens Single Pole 20 AMP GFCI Circuit Breaker | QF120ASiemens QF120A is a compact 1 pole, 20 amp GFCI breaker engineered to provide both overcurrent protection and ground fault sensing for 120 volt circuits commonly used in pool, spa, and outdoor electrical installations. The unit responds to leakage currents above 5 mA, helping prevent shock hazards while maintaining a 10 kA interrupt rating for dependable fault clearing performance. The breaker uses a plug in mounting design compatible with Siemens Q