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Eaton / Cutler-Hammer BR2100ST Miniature Circuit Breaker
- 100A
- 2 Pole
- Plug-On
Eaton / Cutler-Hammer
BR2100ST
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR2100ST
Quantity
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Eaton / Cutler-Hammer BR2100ST - 100A 2 Pole Miniature Circuit Breaker
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Description
Engineered for remote shutdown applications, the Eaton BR2100ST provides 100A overcurrent protection with a factory-installed 120VAC shunt trip. It is ideal for commercial settings requiring emergency disconnect capabilities. Designed for Eaton and legacy Bryant Type BR load centers, this plug-on breaker occupies three one-inch panel spaces. It accepts #4-1/0 AWG wire via box lugs. Rated at 10 kAIC (120/240VAC), it features a common trip mechanism and is HACR rated for HVAC equipment.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR2100ST |
| 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, Handle Lock |
|---|---|
| Accessories | Shunt Trip |
| Standards | Federal Specification W-C375, UL 489 |
| Approval | UL |
| Temp Rating | 60C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
6 answersWhat does the ST suffix mean on the BR2100ST?
The ST designates a factory-installed 120V AC shunt trip. This allows the breaker to be tripped remotely via an external control signal, making it suitable for emergency power-off systems.
How many panel spaces does the BR2100ST require?
While it is a 2-pole breaker, the integrated shunt trip requires one additional pole space. It occupies a total of three 1-inch spaces in a Type BR load center.
Which load centers are compatible with this breaker?
It is designed for plug-on installation in Eaton, Cutler-Hammer, Westinghouse, and legacy Bryant Type BR load centers.
Is the BR2100ST suitable for HVAC applications?
Yes, Eaton Type BR 2-pole circuit breakers are HACR rated, meaning they are approved for use with heating, air conditioning, and refrigeration equipment.
Can this breaker be used to replace older Bryant or Westinghouse breakers?
Yes, Eaton manufactures the BR series as a direct, UL-approved replacement for legacy Cutler-Hammer, Westinghouse, and Bryant Type BR plug-on breakers.
How does the remote shutdown function operate?
The breaker contains a shunt trip coil wired to an external 120V AC source. When voltage is applied to the coil through a remote switch or relay, it mechanically forces the breaker to trip and open the 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.