Zinsco QFP225-3 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Plug-On
Quantity
Zinsco QFP225-3 - 225A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for commercial and industrial applications, the QFP225-3 provides 225 amps of main circuit protection. This 3-pole breaker features a thermal-magnetic trip mechanism rated for 240VAC systems with a 10kA interrupting capacity. It mounts into compatible Zinsco and Sylvania enclosures, offering a seamless replacement solution without the need for panel upgrades. Serving as a direct cross-reference for the UBIZ3225, it ensures safe and code-compliant operation.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | QFP225-3 |
| Series | QFP |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Zinsco Load Centers, Panelboards |
| 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 Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker |
Product FAQs
6 answersWhich electrical panels are compatible with the QFP225-3 circuit breaker?
This breaker is designed for use in Zinsco, GTE Sylvania, and Challenger 3-phase load centers and panelboards that accept QFP-type main breakers.
Can I use this breaker to replace a Challenger or Sylvania QFP225-3?
Yes. Zinsco was acquired by GTE Sylvania, which later became Challenger. The QFP breaker design remained identical across these brands, making this a direct replacement for Sylvania and Challenger QFP225-3 breakers.
How does the QFP225-3 mount into the panel?
It features a plug-in connection that snaps directly onto the panel busbars. When used as a main breaker, ensure it is installed in the dedicated main breaker position and secured with the appropriate hold-down kit required by local codes.
Are there any specific safety checks required before installing a replacement Zinsco breaker?
Yes. Older Zinsco and Sylvania panels are known for busbar degradation. Before installing the replacement breaker, a licensed electrician must inspect the panel busbars for pitting, burn marks, or corrosion to ensure a safe and secure connection.
What type of fault protection does the LI trip function provide?
The LI (Long-Time and Instantaneous) trip unit uses a bimetallic strip to protect against gradual thermal overloads and an electromagnetic coil to trip immediately during severe short-circuit faults.
Is the 10kAIC interrupt rating sufficient for commercial applications?
A 10kAIC rating is standard for many older residential and light commercial Zinsco panels. However, commercial panel builders must verify the available fault current at the installation point does not exceed 10,000 amps to comply with NEC requirements.
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.