UBIZ250-New Zinsco QC50 Replacement. Two Pole 50 Amp Thick Series Manufactured by Connecticut Electric. Replacement Zinsco circuit breaker manufactured new by Connecticut Electric For use in Zinsco circuit breaker panels Intertek ETL Listing to UL Standard 489 for US and Canada-Molded case circuit breakers 10,000 AIC 50 Amp 120/240 VAC 2 Pole breaker in a 1 1/2" body Plug in type May also be branded as Sylvania (ie Sylvania QC50)