Siemens Low Voltage Molded Case Circuit Breakers Special Application PanelboardMtg 240V Breakers - HD Ltng 1-pole TM BL 10KAIC 120VAC are Circuit Protection Molded Case Circuit Breakers. Type BL Special Features High-Intensity Discharge Application Electrical Distribution Standard UL 489 Voltage Rating 120V Amperage Rating 20A Trip Range Thermal Magnetic Interrupt Rating 10 AIC Number Of Poles 1P