Hot Picks Zinsco UBIZ250 – 50A 2 Pole Miniature Circuit Breaker

Essential for keeping legacy systems operational, this 50-amp residential component provides robust thermal-magnetic trip functions. It offers a safe solution for homes with older infrastructure. Engineered to match original specifications, it replaces discontinued QC50 and QCAL50 models. The unit plugs into Zinsco Type QC load centers, ensuring proper alignment without adapters. Beyond standard 10kAIC protection, this model features HACR and SWD ratings for HVAC and lighting loads.