Zinsco QCAL100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Plug-On
Quantity
Zinsco QCAL100 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Maintaining older electrical infrastructure is simplified with this 100-amp, two-pole molded case breaker. It delivers reliable long-time and instantaneous trip functions for 120/240VAC systems. The unit mounts into classic Zinsco and Sylvania panels, providing an exact physical match for the original hardware. As a recognized cross-reference for the UBIZ2100, it eliminates the need for aftermarket adapter kits.Specifications
| Brand | Zinsco |
|---|---|
| Part Number | QCAL100-R |
| Series | QC |
| Amperage | 100A |
| 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, Sylvania 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 |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
6 answersWhat load centers are compatible with the Zinsco QCAL100?
The QCAL100 is designed for use in classic Zinsco and Sylvania load centers that accept Type QC plug-in circuit breakers.
What are the direct replacements for the Zinsco QCAL100?
The QCAL100 can be replaced by the Connecticut Electric UBIZ2100, as well as breakers labeled QC2100 or QC100, provided they match the 100A, 2-pole, Type QC specifications.
How does the QCAL100 connect to the panel busbar?
This breaker features a plug-in connection type, allowing it to snap directly onto the busbar of compatible Zinsco or Sylvania panels without the need for aftermarket adapter kits.
Are there known safety concerns with older Zinsco electrical panels?
Yes. Many original Zinsco panels have documented issues with aluminum busbars corroding or arcing, and breakers failing to trip under overcurrent conditions. Licensed electricians should thoroughly inspect the panel busing for heat damage before installing a replacement breaker.
What wire sizes are accepted by the QCAL100 terminals?
The load lugs on the QCAL100 accept wire gauges from 4 AWG up to 300 kcmil. Always verify the appropriate wire size for a 100A circuit based on the National Electrical Code and the conductor material.
What type of trip mechanism does the QCAL100 use?
It utilizes a fixed thermal magnetic trip unit, providing both long-time protection against sustained overloads and instantaneous protection against short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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!