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Eaton / Cutler-Hammer BR3100 Miniature Circuit Breaker
- 100A
- 3 Pole
- Plug-On
Eaton / Cutler-Hammer
BR3100
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR3100
Quantity
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Eaton / Cutler-Hammer BR3100 - 100A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
Quantity
Eaton / Cutler-Hammer BR3100 - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR3100 |
| Series | BR |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Type BR Load Centers |
| Wire Gauge | 4 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C, 75C |
| Construction Features | Common Trip |
Sold out
Quantity
Eaton / Cutler-Hammer BR3100 - 100A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR3100-R |
| Series | BR |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Type BR Load Centers |
| Wire Gauge | 4 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C, 75C |
| Construction Features | Common Trip |
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Description
Built for three-phase distribution, this 100-amp three-pole component ensures consistent power delivery across commercial environments. The common trip configuration guarantees an overload on any leg will disconnect all phases. Requiring three inches of panel space, the unit mounts into compatible Eaton Type BR three-phase load centers. Box lug terminals accommodate 4 to 1/0 AWG conductors. Rated for 10 kAIC at 240VAC, it utilizes fixed thermal and magnetic trip elements for reliable defense.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR3100-R |
| Series | BR |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Type BR Load Centers |
| Wire Gauge | 4 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C, 75C |
| Construction Features | Common Trip |
Product FAQs
6 answersCan I install this 3-pole breaker in a single-phase residential panel?
No. The BR3100 is a 3-pole breaker designed for 3-phase distribution. It will not physically fit or function correctly in a standard single-phase Type BR panel, which only accommodates single and 2-pole breakers.
How much panel space is required to install the BR3100?
This breaker requires three standard 1-inch spaces, taking up a total width of 3 inches in a compatible Eaton Type BR load center.
Can I install a Type BR breaker in an Eaton Type CH load center?
No. Eaton Type BR and Type CH load centers feature completely different bus configurations. The BR3100 requires 1-inch spaces and will not physically fit into the 3/4-inch bus layout of a Type CH panel.
Will the Eaton BR3100 replace an older Bryant or Westinghouse breaker?
Yes. Eaton Type BR breakers are direct, UL-approved replacements for legacy Cutler-Hammer, Bryant, Challenger, and Westinghouse panels that accept BR-style plug-on breakers.
Do I need to use a hold-down kit when backfeeding this breaker?
Yes. If you are installing the BR3100 as a backfed main breaker, the National Electrical Code requires a compatible hold-down retainer kit to securely fasten the breaker to the panel bus bar.
Is this circuit breaker rated for HVAC equipment?
Yes. The Eaton BR3100 carries a listing for HACR (Heating, Air Conditioning, and Refrigeration) applications, making it certified for use with modern HVAC equipment requiring overcurrent protection.
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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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- 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.