Siemens BA115AFCH Type BL Molded Case Circuit Breaker With Insta Wire, 120 VAC, 15 A, 22 kA Interrupt, 1 Pole

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 arc fault is detected.