Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Zinsco QCAL125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Zinsco
QCAL125
Molded Case Circuit Breaker
Brand
Zinsco
SKU
QCAL125
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Zinsco QCAL125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Sold out
Quantity
Zinsco QCAL125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Zinsco |
|---|---|
| Part Number | QCAL125 |
| Series | QC |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Zinsco Load Centers |
| Wire Gauge | #4 AWG - 300 kcmil |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 | 40°C |
| Construction Features | HACR Rated, Thick Series |
Sold out
Quantity
Zinsco QCAL125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Zinsco |
|---|---|
| Part Number | QCAL125-R-R |
| Series | QC |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Zinsco Load Centers |
| Wire Gauge | #4 AWG - 300 kcmil |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 | 40°C |
| Construction Features | HACR Rated, Thick Series |
Similar Items
Description
Built for residential and commercial applications, this 125A Zinsco breaker delivers reliable thermal-magnetic protection. The two-pole unit features a 1.5-inch thick profile designed specifically for legacy Zinsco load centers. As an exact OEM-style fit, it requires no adapters for installation. Rated at 10 kAIC at 120/240VAC, the QCAL125 is HACR rated for HVAC equipment. For modern equivalents, this unit is replaced by the UBIZ2125.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | QCAL125-R-R |
| Series | QC |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Zinsco Load Centers |
| Wire Gauge | #4 AWG - 300 kcmil |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 | 40°C |
| Construction Features | HACR Rated, Thick Series |
Product FAQs
4 answersWhich load centers accept the Zinsco QCAL125 circuit breaker?
The QCAL125 is an exact OEM-style fit designed specifically for legacy Zinsco load centers that accept QC-type breakers. It features a 1.5-inch thick profile and installs directly onto the busbar without requiring any aftermarket adapters.
What is the modern aftermarket replacement for the QCAL125?
Because original Zinsco breakers are obsolete, Connecticut Electric manufactures a modern equivalent. The direct replacement catalog number is UBIZ2125 (or UBIZ2125-1), which is designed to fit the exact same legacy Zinsco panels.
Are there known safety issues with legacy Zinsco electrical panels?
Yes. Legacy Zinsco panels have well-documented reliability concerns, including breakers failing to trip during overcurrent events and arcing issues at the aluminum busbar connections. While replacement breakers can be used for temporary repairs or maintenance, most licensed electricians strongly recommend a complete panel upgrade when feasible.
Can the QCAL125 be used to supply power to HVAC equipment?
Yes. The QCAL125 is HACR rated, meaning it is certified for use with heating, ventilation, and air conditioning equipment that requires a breaker with this specific designation.
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 15 reviews.
Total 5 star reviews: 15 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Search
Rating
15 reviews
- DSDenise S. A.Verified BuyerReviewingEaton / Cutler-Hammer QC3070H - 70A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Great turn around!
My experience was great. I had the item quickly; and it was more reasonably priced than other places I checked. Not having to pay freight was an absolute bonus.
- DMDouglas M.Verified BuyerReviewingEaton / Cutler-Hammer QC1020 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/28/25Just what I needed
Ordering was easy and the processing was immediate. The beakers I ordered was exact. I recommend this company for your needs.
- GLGianna L.ReviewingEaton / Cutler-Hammer QC1015 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/27/23Great
as advertised!
- EDElmer D.ReviewingZinsco QCAL100 - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/28/23Very accurate, delivered on time
Very accurate, delivered on time and fixed my problem good job
- RBRawle B.ReviewingEaton / Cutler-Hammer QC1015 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/8/23SuperBreakers had the parts I
SuperBreakers had the parts I needed in stock, was shipped and delivered on time. Great service!