The Square D by Schneider Electric Homeline 20 amp One-Pole GFCI circuit breaker is designed for overload and short-circuits protection, combined with Class A ground fault protection. Class A denotes a ground fault circuit interrupter that will trip when a fault current to ground is 6 milliamp or more. This breaker is compatible with Homeline load centers and CSED devices. Designed exclusively for the residential market, Homeline products offer everything you need to distribute electricity throughout your home.