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Eaton / Cutler-Hammer BR320 Miniature Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Eaton / Cutler-Hammer
BR320
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR320
Quantity
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Eaton / Cutler-Hammer BR320 - 20A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer BR320 - 20A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR320 |
| Series | BR |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Eaton Type BR Load Centers, Bryant Load Centers, Challenger Load Centers, Westinghouse Load Centers |
| Wire Gauge | 14-4 AWG (Cu/Al) |
| 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 | Padlock Attachment, Handle Lock |
|---|---|
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated |
Sold out
Quantity
Eaton / Cutler-Hammer BR320 - 20A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR320-R |
| Series | BR |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Eaton Type BR Load Centers, Bryant Load Centers, Challenger Load Centers, Westinghouse Load Centers |
| Wire Gauge | 14-4 AWG (Cu/Al) |
| 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 | Padlock Attachment, Handle Lock |
|---|---|
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated |
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Description
Built for standard power distribution, this 20-amp, 3-pole miniature circuit breaker provides essential thermal-magnetic protection. It is ideal for residential and commercial 240V applications requiring a reliable disconnect and overcurrent defense. The plug-on unit mounts into Eaton Type BR load centers and serves as an exact replacement for legacy Bryant, Challenger (C320), and Westinghouse panels. It requires three standard 1-inch pole spaces for installation.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR320 |
| Series | BR |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Eaton Type BR Load Centers, Bryant Load Centers, Challenger Load Centers, Westinghouse Load Centers |
| Wire Gauge | 14-4 AWG (Cu/Al) |
| 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 | Padlock Attachment, Handle Lock |
|---|---|
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
5 answersCan I use this breaker to replace older Challenger or Westinghouse models?
Yes. Eaton Type BR breakers are UL 489 listed direct replacements for legacy Bryant, Westinghouse, and Challenger panels. For Challenger panels, this unit is the exact replacement for the C320 catalog number.
How much panel space does the BR320 circuit breaker require?
Because the BR series utilizes a 1-inch per pole footprint, this 3-pole breaker requires three standard 1-inch spaces in your compatible load center.
What does the common trip feature mean on this 3-pole breaker?
An internal common trip mechanism ensures that if an overcurrent or short circuit occurs on any single pole, all three poles will open the circuit simultaneously. This protects connected three-phase machinery from continuing to run on missing phases.
Are Cutler-Hammer BR320 breakers different from Eaton BR320 breakers?
No, they are the exact same component. Eaton acquired Cutler-Hammer and continues to manufacture the standard BR plug-on product line under the Eaton brand name.
Can I install this breaker in a Square D or Siemens load center?
No. Even though they share a similar 1-inch plug-on form factor, Eaton BR breakers are not UL listed for use in Square D, Siemens, or GE panels. You must use the manufacturer-specified breakers to maintain UL compliance and panel certifications.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 70 reviews.
Reviews Summary
Generated by AI from 96 most recent customer reviews
Last updated 8/15/25
Customers say these circuit breakers arrive quickly and fit their needs perfectly. Many reviews mention competitive pricing and reliable availability, particularly for hard-to-find models. The products consistently meet expectations for installation and functionality. Reviews frequently note the precise fit and immediate operation of these breakers. Some users appreciate the option of both new and refurbished units.
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Rating
70 reviews
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delivered on time as described
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delivered on time as described
- MPMichael P.Verified BuyerReviewingEaton / Cutler-Hammer BR1520 - 15/20A Tandem Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/26An excellent business
In this day and age it can be a challenge at times finding a reputable business that fills your order correctly and at the right price and without delay. I am very pleased with your service. Thank you.