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Zinsco UBIZ250 Miniature Circuit Breaker
- 50A
- 2 Pole
- Plug-On
Zinsco
UBIZ250
Miniature Circuit Breaker
Brand
Zinsco
SKU
UBIZ250
Quantity
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Zinsco UBIZ250 - 50A 2 Pole Miniature Circuit Breaker
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Quantity
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Description
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.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | UBIZ250 |
| Series | UBIZ |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Zinsco Load Centers (Type QC) |
| Wire Gauge | 14-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Standards | HACR, SWD, UL 489 |
|---|---|
| Approval | ETL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
5 answersWhich load centers are compatible with the UBIZ250 breaker?
This breaker is designed to fit legacy Zinsco, Sylvania, and Magnetek load centers that require Type QC plug-on circuit breakers.
Which obsolete Zinsco part numbers does this breaker replace?
The UBIZ250 is a direct aftermarket replacement manufactured by Connecticut Electric. It replaces original Zinsco, Sylvania, and Magnetek part numbers QC50, QCAL50, and Q250.
Are UBIZ aftermarket breakers tested to modern safety standards?
Yes, Connecticut Electric UBIZ replacement breakers are ETL listed and rigorously tested to meet the ANSI/UL 489 standard for molded case circuit breakers.
Are adapters required to install this breaker in an original Zinsco panel?
No adapters or panel modifications are needed. The breaker features the original style plug-on clips to snap directly onto the legacy Zinsco busbar.
Is this breaker approved for use with air conditioning equipment?
Yes, it carries an HACR rating, making it suitable for heating, air conditioning, and refrigeration motor loads that require a 50-amp circuit.
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