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Eaton / Cutler-Hammer BR2100B Miniature Circuit Breaker
- 100A
- 2 Pole
- Plug-On
Eaton / Cutler-Hammer
BR2100B
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR2100B
Quantity
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Eaton / Cutler-Hammer BR2100B - 100A 2 Pole Miniature Circuit Breaker
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Description
Engineered for specialized residential applications, the Eaton BR2100B delivers 100 amps of reliable thermal-magnetic protection. This two-pole breaker is specifically designed with a tapped molded opening to support optional hold-down kits. It mounts into standard Eaton Type BR load centers and serves as an exact replacement for older BR2100B units. Delivering a 10kAIC interrupting rating at 120/240VAC, this HACR-rated component includes a common trip mechanism for synchronized disconnection.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR2100B-R |
| Series | BR |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | BR |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Type BR Load Centers |
| Wire Gauge | 4-1/0 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 |
| Available Options | Padlock Attachment, Hold-Down Kit |
|---|---|
| Accessories | Tapped hole for hold-down kit |
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated, Tapped Molded Opening |
Product FAQs
8 answersWhat is the difference between the Eaton BR2100 and the BR2100B?
The B suffix indicates that the breaker features a tapped molded opening designed to accept legacy hold-down kits. Both models provide the same 100A thermal-magnetic protection and fit the same load centers.
Which load centers are compatible with the BR2100B?
This Type BR breaker is designed for Eaton and Cutler-Hammer BR series load centers. It is also UL-listed for use as a replacement in legacy Westinghouse, Challenger, and Bryant panels that accept 1-inch Type BR breakers.
Can the BR2100B be used as a back-fed main breaker?
Yes. Because it features a tapped molded opening, it easily accepts a hold-down kit. The National Electrical Code (NEC) requires a hold-down kit when using a plug-on breaker as a back-fed main to prevent it from being accidentally removed while energized.
What does the LI trip function code indicate?
The LI designation stands for Long-Time and Instantaneous trip functions. The thermal Long-Time element protects against sustained overloads, while the magnetic Instantaneous element trips the breaker immediately during a short circuit.
Is this breaker suitable for HVAC equipment?
Yes, the BR2100B is HACR rated, making it suitable for use with the motor loads typically found in heating, air conditioning, and refrigeration equipment.
Does this breaker require a neutral connection?
No, the BR2100B is a standard thermal-magnetic breaker. It does not provide AFCI or GFCI protection and does not require a neutral pigtail or plug-on neutral connection to operate.
Can I use aluminum wire with the BR2100B box lugs?
Yes, the terminals are rated for both copper (Cu) and aluminum (Al) conductors ranging from 4 AWG to 1/0 AWG. When terminating aluminum wire, applying a listed joint compound is recommended to prevent oxidation.
Does the BR2100B feature an internal common trip?
Yes, this 2-pole breaker features an internal common trip mechanism. If a fault occurs on either pole, both poles will trip simultaneously to safely disconnect the entire 240V circuit.
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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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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.