Zinsco QFP225-2 Molded Case Circuit Breaker
- 225A
- 2 Pole
- Plug-On
Quantity
Zinsco QFP225-2 - 225A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered to fit older residential and commercial panelboards, the QFP225-2 delivers 225 amps of main circuit protection. It features a thermal-magnetic trip mechanism rated for 120/240VAC systems with a 10kA interrupting capacity. This unit installs into compatible Zinsco enclosures, providing an exact replacement solution. It serves as a reliable substitute for the UBITBFP2252, ensuring safe and code-compliant operation in existing electrical setups.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | QFP225-2 |
| Series | QFP |
| Amperage | 225A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Zinsco Load Centers |
| Wire Gauge | 1 AWG - 300 kcmil |
| Max Wire | 300 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker |
Product FAQs
6 answersWhich load centers can accept the Zinsco QFP225-2 main breaker?
This breaker is specifically designed to fit legacy Zinsco panelboards and load centers. It is not compatible with modern panels from other manufacturers.
What is the Connecticut Electric cross-reference for the QFP225-2?
The Connecticut Electric UBITBFP2252 is the direct aftermarket replacement for this 225-amp Zinsco main breaker.
What wire gauge is required for the QFP225-2 lugs?
The load side lugs accommodate wire sizes from 1 AWG up to 300 kcmil. Always verify the correct wire size based on the conductor material and local electrical codes for a 225-amp service.
What should I check before installing a replacement Zinsco main breaker?
Legacy Zinsco panels are prone to bus bar damage and arcing. Before installing the QFP225-2, a licensed electrician must inspect the panel bus bars for pitting, melting, or burn marks. If the bus bar is damaged, the entire panel typically requires replacement.
Does the QFP225-2 require mounting hardware to attach to the bus bar?
No, this is a plug-on style breaker. It presses directly onto the bus bar clips in compatible Zinsco enclosures without the need for bolt-on hardware.
What does the LI trip function on the QFP225-2 indicate?
The LI designation means the thermal-magnetic trip unit provides Long-Time protection against sustained overloads and Instantaneous protection to quickly clear severe short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
- KYKathleen Y.Verified BuyerReviewingMilbank UQFP-100 2 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars1/1/26Milbank 100 2 Pole Circuit Breaker
Product arrived on time, well packaged and exactly what we needed.
Jake was extremely helpful and courteous. You don’t find that too often these days. Will spread the word and recommend your company to all that require your service.
Thank you and Happy New Year
Sincerely,
K. Young
- QAquinlan a.Verified BuyerReviewingZinsco QFP2200T - 200A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/26/25Great communication and customer service
Ordered QFP2200T breaker and paid to ship overnight. Reached out to company when breaker did not arrive on time. Although I did not get the breaker when expected, they did communicate the situation, refunded my shipping and expedited the breaker to me once it was ready for shipping. They handled the situation in the best possible way given the circumstances.
Would buy from them again.
-Quinlan (Q-Extra Electrical Services)
- ARAized R.ReviewingZinsco QFP2200T - 200A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/7/21Excellent service!
I needed an obsolete part. They had it and sent it. Turned out it was the wrong part. Their customer service made up for it. They sent the correct part overnight and also sent a free ups label to return the wrong part. Great service! Highly recommend. And the refurbished part looked like it was in great shape.