Zinsco Circuit Breakers

Zinsco - obsolete circuit breakers.

We stock a huge inventory of used Zinsco breakers and Zinsco-style replacement breakers, in both half sizes and full sizes, with standard trip mechanisms. Each breaker is inspected, tested, and guaranteed to work or we'll replace it for free (1-year warranty). This is a great option if you need to replace a single breaker without changing out the entire electrical panel. If you prefer a new breaker over a used breaker, we also stock brand new Connecticut Electric UBIZ breakers, which are manufactured specifically to fit in Zinsco panels and replace many of the obsolete Zinsco breakers out there.

Types of Zinsco circuit breakers.

Zinsco breakers are available in a wide variety of configurations, current ratings and voltage ratings. Popular Zinsco circuit breaker models include the R3820, RC3830, QCAL100, and Q20 among others. Current ratings for Zinsco breakers range from 15A to 225A and are available in 1 pole, 2 pole or 3 pole configurations. Don't know which model you have? Send us a photo and we'll help you get the right replacement.