Siemens Low Voltage Residential Circuit Breakers Miniature Thermal Mag Circuit Breakers - Duplex, Triplex, Quadplex are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type MH-T, Quadplex Special Features Features 1/2 IN width-per-pole construction Wire Size 14-8 AWG Copper, 12-8 AWG Aluminum Standard UL Listed, CSA Certified, SWD, HACR Rated Voltage Rating 120/240 Amperage Rating (2) 2-Pole 20 AMP Interrupt Rating 10 Number Of Poles 4 Length 3/1/2008 Width 2 Height 3 Operating Temperature 40