Connecticut Electric UBITB-A120L Circuit Breaker, 20 amp, Black Replacement Challenger MH120-L Type A circuit breaker manufactured new by Connecticut Electric For use in Challenger Type A circuit breaker panels Intertek ETL Listing to UL Standard 489-Molded case circuit breakers 10,000 AIC 20 Amp, Left Clip 120 VAC 1 Pole breaker 1/2" thin type breaker Plug in type May also be branded: Murray, Crouse-Hinds, or Sylvania