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Eaton / Cutler-Hammer CH345 Miniature Circuit Breaker
- 45A
- 3 Pole
- Plug-On
Eaton / Cutler-Hammer
CH345
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
CH345
Quantity
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Eaton / Cutler-Hammer CH345 - 45A 3 Pole Miniature Circuit Breaker
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Description
Built for demanding commercial and industrial loads, this 45-amp miniature breaker utilizes a trip-free mechanism that prevents the contacts from being held closed during a fault. It carries a 10kA interrupt capacity at 240VAC. The device fits Eaton and Cutler-Hammer Type CH panelboards, occupying three standard 3/4-inch pole spaces. It is not compatible with BR series enclosures. An HACR certification makes this unit suitable for heating, air conditioning, and refrigeration circuits.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | CH345 |
| Series | CH |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | CH |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton CH Loadcenters |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489 |
| Approval | UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
6 answersCan I install the CH345 in an Eaton BR series load center?
No. The CH345 is designed exclusively for Eaton and Cutler-Hammer Type CH load centers. It will not fit BR series panels, which require 1-inch wide breakers.
How much panel space does the CH345 require?
This 3-pole breaker requires three standard 3/4-inch pole spaces, taking up a total width of 2.25 inches in a Type CH load center.
Is the CH345 suitable for HVAC equipment?
Yes, the CH345 is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration circuits that require a 45A breaker.
Is there a difference between an Eaton CH345 and a Cutler-Hammer CH345?
No. Eaton acquired Cutler-Hammer, and the CH345 is the exact same breaker regardless of whether it is branded as Eaton or Cutler-Hammer.
How does the CH345 indicate a tripped condition?
Standard Type CH breakers feature a 'Trip to OFF' mechanism. When a fault occurs, the breaker handle moves directly to the OFF position to clearly indicate the circuit has been interrupted.
How does the thermal-magnetic trip mechanism function on this breaker?
The CH345 uses Long-Time and Instantaneous (LI) trip functions. The thermal element prevents nuisance tripping on mild overloads, while the magnetic element reacts instantly to severe short-circuit conditions.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 76 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 8/5/25
Customers say these electrical breakers are readily available when hard to find elsewhere. Many reviews mention fast shipping and accurate order fulfillment. Common feedback includes competitive pricing and proper packaging. Reviews note the products fit correctly and match specifications. While most highlight quick delivery times, some mention occasional supply delays. The ordering process receives praise for its simplicity.
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Rating
76 reviews
- EKEdward K.Verified BuyerReviewingEaton / Cutler-Hammer CHFP120DF - 20A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/28/26Eaton residential dual function 20amp
I am hopeful this fairly new arc monitor circuit breaker idea is going to have a more longevity future. Founder Fred Kiko was an amazing man. Always room for safety inventions.
- ELEDUARDO L.Verified BuyerReviewingEaton / Cutler-Hammer CH120AF - 20A AFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/23/26Breker replacement
Work perfectly.
- JGJason G.Verified BuyerReviewingEaton / Cutler-Hammer CH220GFI - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/24/26It was as advertised
It was delivered on time and works.
- LGlarry g.Verified BuyerReviewingEaton / Cutler-Hammer CH335 - 35A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/20/26good
Great part quick shipping
- PLPhid L.Verified BuyerReviewingEaton / Cutler-Hammer CH230GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/7/26EFFICIENT
BREAKER ARRIVED QUICKLY. WELL PACKAGED FOR PROTECTION.