⚡ Power Your Home with Confidence! Intertek ETL Listed to UL Standard 489 for peace of mind. 1 1/2" body fits snugly in your circuit panel. Seamlessly replaces Zinsco QC50 for reliable performance. Easy installation with a user-friendly plug-in design. Supports 120/240 VAC for versatile applications. 50 Amp Power Plug-in Design 10,000 AIC Safety The Connecticut Electric UBIZ250 Circuit Breaker is a newly manufactured replacement for Zinsco QC50, designed for use in Zinsco circuit breaker panels. This two-pole, 50 Amp breaker features a compact 1 1/2" body and is ETL Listed to UL Standard 489, ensuring safety and reliability. With a 10,000 AIC rating and compatibility with 120/240 VAC, it offers both performance and peace of mind for your electrical needs.