Connecticut Electric VPKUBIZ20 Single Pole Circuit Breaker for Zinsco, 20 AmpZinsco circuit breaker by Connecticut Electric Type UBIZ. For use in Zinsco load centers that accept type Q circuit breakers. ETL Listed. 10,000 AIC 1 pole 20A. Type UBIZ 20A,120V Replacement circuit breaker for Zinsco Single pole circuit breaker Thick For use in Zinsco load centers that accept type Q circuit breakers ETL Listed 10,000 AIC 1 pole 20A Clam shell. WARNING: This product can expose you to chemicals including Nickel (Metallic), which is