Square D by Schneider Electric QO 15 Amp 1-pole Plug-on Neutral Dual Function Circuit Breaker is a space and labor saving device, engineered to meet prevailing NEC requirements. This device combines 2 critical technologies, Combination Arc Fault protection and Ground Fault protection (class A), in a single, easy-to-install device. The NEC now requires both Combination Arc Fault and Ground Fault protection on all 1-Pole, 15 Amp and 20 Amp kitchen and laundry circuits. Prior to the release of this new device, a contractor or homeowner's only choice would have been to use a Combination Arc Fault circuit breaker in conjunction with an expensive, bulky Ground Fault receptacle. The new Dual Function circuit breakers help reduce cost and eliminate the hassle of using 2 separate devices to provide this essential protection. It's a win for contractors and homeowners alike. Designed for reliability, the Homeline Plug-on Neutral Dual Function Circuit Breaker connects directly to the neutral bar, providing a time and labor-saving installation. Several advantages from the Plug-on Neutral design are fewer connections which lead to faster installation and an innovative neutral clip eliminates pigtails which in turn frees gutter space. Like all Square D CAFI Circuit Breakers, it is integrated with time saver Diagnostics, a unique feature that provides additional circuit information and minimizes troubleshooting at the touch of a button.