Siemens MP24520, 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 Application Electrical Distribution Standard Ul 489 Voltage Rating 120/240V Amperage Rating 45-20A Trip Range Thermal Magnetic Interrupt Rating 10 Aic Number Of Poles Two Single Poles And One Double Pole