Siemens Low Voltage Molded Case Circuit Breakers Panelboard Mounting 240V Circuit Breakers - Type BL, 3-Pole, 240VAC are Circuit Protection Molded Case CircuitBreakers. Type BL Application Electrical Distribution Standard UL 489 Voltage Rating 240V Amperage Rating 20A Trip Range Thermal Magnetic Interrupt Rating 10 AIC Number Of Poles 3P