Zinsco QFP2125T Molded Case Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Quantity
Zinsco QFP2125T - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
The QFP2125T is a 125A, 2-pole main circuit breaker designed for residential and commercial power distribution. It provides essential overcurrent protection for main service entrances. Built to fit legacy Zinsco load centers, this plug-on breaker installs easily without adapter kits. It serves as an exact replacement for aging units and can be substituted with the UBITBFP1252. Featuring offset top feed lugs, it delivers a 10kAIC rating at 120/240VAC with fixed thermal-magnetic trip technology.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | QFP2125T |
| Series | QFP |
| Amperage | 125A |
| 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, Offset Lugs |
Product FAQs
5 answersWhat load centers are compatible with the QFP2125T circuit breaker?
This main breaker is designed exclusively for legacy Zinsco, Sylvania, and Challenger load centers that accept QFP-frame plug-in breakers.
What are the alternate catalog numbers and modern replacements for the QFP2125T?
The QFP2125T is frequently cross-referenced as QFP125-2. If an original equipment manufacturer replacement is unavailable, the Connecticut Electric UBITBFP1252 serves as a direct aftermarket substitute.
How does this breaker mount into the electrical panel?
The QFP2125T utilizes a standard plug-in mounting configuration that connects directly to the bus bar of compatible vintage Zinsco enclosures without requiring aftermarket adapters.
What wire sizes are accepted by the terminals on the QFP2125T?
The off-set load side lugs are designed to accommodate wire gauges ranging from 1 AWG up to 300 kcmil.
What type of overcurrent protection does the QFP2125T provide?
It features a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions, providing reliable protection against both sustained overloads and sudden short circuits.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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.