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Eaton / Cutler-Hammer QC2045 Miniature Circuit Breaker
- 45A
- 2 Pole
- Panel Mount
Eaton / Cutler-Hammer
QC2045
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
QC2045
Quantity
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Eaton / Cutler-Hammer QC2045 - 45A 2 Pole Miniature Circuit Breaker
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Description
The QC2045 is part of Eaton's Quicklag family, delivering 45A of thermal-magnetic protection for commercial applications. This two-pole miniature breaker features a cable-in/cable-out design, making it ideal for control panels and enclosures. Accommodating 14-4 AWG wiring via box lugs, this panel-mount unit can also adapt to DIN rail installations with an optional bracket. Rated 10 kAIC at 120/240VAC, it ensures robust defense against overloads and is fully HACR rated for HVAC equipment.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | QC2045 |
| Series | QC |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Panel Mount |
| Voltage | 120/240VAC, 48VDC, 62.5VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC, 3.8kA @ 62.5VDC |
| Frame Type | QC |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Control Panels, Enclosures, DIN Rail (with adapter) |
| Wire Gauge | 14-4 AWG (Al/Cu) |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | DIN Rail Adapter, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhat types of panels or enclosures is the QC2045 compatible with?
The QC2045 is a cable-in, cable-out miniature circuit breaker designed for control panels and specialized enclosures. It is a feed-thru breaker and is not designed to plug into standard residential load centers.
How is the QC2045 mounted?
This breaker features a feed-thru panel mount design. It can also be installed on a standard 35mm DIN rail when equipped with the appropriate Eaton DIN rail adapter bracket.
What type of terminals does the QC2045 use for wire connections?
The QC2045 uses standard box lugs for cable-in, cable-out feed-thru connections. These lugs accommodate 14 AWG to 4 AWG aluminum or copper wiring.
Is the QC2045 HACR rated for HVAC applications?
Yes, Eaton Quicklag QC breakers from 10A to 100A, including the QC2045, are fully HACR rated for use with heating, air conditioning, and refrigeration equipment.
Are Eaton and Cutler-Hammer QC2045 breakers the exact same unit?
Yes. Eaton acquired Cutler-Hammer, and the QC2045 is the exact same Quicklag miniature circuit breaker manufactured under both brand names.
Is the QC2045 suitable for DC control circuits?
Yes, this thermal magnetic breaker is rated for DC applications. It provides a 5kAIC interrupting rating at 48VDC and a 3.8kAIC rating at 62.5VDC.
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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
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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!