Siemens SpeedFax™ QA115AFC Q Series Arc Fault Circuit Breaker, 120 VAC, 15 A, 10 kA Interrupt, 1 Pole, Thermal Magnetic Trip

AFCI's detect arcing faults (an unintentional arcing condition in a circuit) that standard circuit breakers are unable to detect. The device is intended to mitigate the effects of arcing faults by functioning to de-energize the circuit when an arcfault is detected.