Siemens Low Voltage Residential Circuit Breakers Main Breakers - Type QPP/MPP Breakers are Circuit Protection Load Center Mains, Feeders, and Miniature CircuitBreakers. Type HQPP Application Electrical Distribution Standard UL 489 VoltageRating 120/240V Amperage Rating 150A Trip Range Thermal Magnetic Interrupt Rating 65 AIC Number Of Poles 2P