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Eaton / Cutler-Hammer QC3045H Miniature Circuit Breaker
- 45A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
QC3045H
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
QC3045H
Quantity
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Eaton / Cutler-Hammer QC3045H - 45A 3 Pole Miniature Circuit Breaker
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Description
Belonging to the Quicklag series, the Eaton QC3045H is a 3-pole, 45A miniature circuit breaker. It delivers dependable protection for commercial control panels. This panel-mount unit features cable-in/cable-out box lugs accepting 14-4 AWG wire. With an optional adapter, it installs onto standard DIN rails for flexible integration into enclosures. Rated 10 kAIC at 240VAC, it utilizes fixed thermal-magnetic trip technology. The breaker is HACR rated with a non-interchangeable trip unit.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | QC3045H |
| Series | QC |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 48VDC, 62.5VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 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 |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, DIN Rail Adapter |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Visual Trip Indicator, Quick-Make/Quick-Break, Trip-Free Mechanism, Common Trip |
Product FAQs
7 answersHow is the Eaton QC3045H circuit breaker mounted?
This Quicklag QC series breaker features a cable-in, cable-out design for feed-thru panel mounting. It can also be installed on a standard DIN rail when paired with the appropriate Eaton adapter bracket.
Does the QC3045H require a specific busbar connection?
No. Unlike plug-on or bolt-on breakers, the QC series is a cable-in, cable-out design. It uses box lugs for both the line and load side connections, meaning it does not connect directly to a panelboard busbar.
What types of applications are suitable for the QC3045H breaker?
As a feed-thru miniature circuit breaker, the QC3045H is frequently utilized in industrial control panels, automation enclosures, and specialized OEM equipment where traditional busbar connections are not available.
Can I use the Eaton QC3045H to replace an older Cutler-Hammer breaker with the same part number?
Yes. Eaton acquired Cutler-Hammer and continues to manufacture the Quicklag QC series under the Eaton brand. An Eaton QC3045H is the exact replacement for a legacy Cutler-Hammer QC3045H.
What wire sizes are compatible with the box lugs on this 45A breaker?
The box lug terminals on the QC3045H are designed to accept wire sizes ranging from 14 AWG to 4 AWG. Always apply the manufacturer recommended torque during installation to ensure a secure connection.
Does the QC3045H provide protection for DC circuits?
Yes. In addition to its standard AC ratings, this breaker is certified for DC applications. It provides an interrupting capacity of 5kA at 48VDC and 3.8kA at 62.5VDC.
What type of trip mechanism does the QC3045H utilize?
It uses a fixed thermal-magnetic trip unit with non-interchangeable elements. The thermal component provides long-time delay protection against overloads, while the magnetic component offers 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.
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!