The Square D by Schneider Electric Homeline 50 amp Two-Pole GFCI circuit breaker is designed for overload and short-circuit 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 mA 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.