The Schneider Electric Homeline Square D 20 Amp Two-Pole GFCI Circuit Breaker is designed for overload and short circuit protection, combined with Class A ground fault protection. Class A indicates a ground fault circuit interrupter which will be tripped when a ground fault current is 6 millimeters or more. This switch is compatible with Homeline load centers and CSED devices. The ANSI listed and UL listed unit is rated for 120/240 VAC and 10,000 AIR. Homeline circuit breakers are built with the same Square D brand quality you have come to expect at a price that makes them the best value in their class. Homeline circuit breakers are best in class. Designed exclusively for the residential market, Homeline products offer everything you need to distribute electricity throughout your home.