Siemens Low Voltage Residential Circuit Breakers Miniature Circuit Breakers AFCI - Combo AFCI 2-pole plug-on 10k and 22k are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type Combination Type AFCI StandardUL Listed Voltage Rating 120/240 Amperage Rating 20 Number Of Poles 2 OperatingTemperature 40