Eaton / Cutler-Hammer BR245ST Miniature Circuit Breaker
- 45A
- 2 Pole
- Plug-On
Eaton / Cutler-Hammer
BR245ST
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR245ST
Quantity
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Eaton / Cutler-Hammer BR245ST - 45A 2 Pole Miniature Circuit Breaker
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Description
Designed for specialized control applications, the Eaton BR245ST is a 45-amp, 2-pole miniature circuit breaker equipped with a factory-installed shunt trip. This allows the breaker to be tripped remotely via an external voltage signal. The breaker utilizes a plug-on mounting design compatible with Eaton Type BR, Bryant, Challenger, and Westinghouse load centers. Because of the integrated shunt trip module, this unit requires three full pole spaces in the panel. It features a 10kAIC rating.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | BR |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| 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 |
|---|---|
| Accessories | Shunt Trip |
| Standards | Federal Specification W-C375, UL 489 |
| Approval | UL |
| Temp Rating | 60C to 75C |
| Construction Features | HACR Rated, Common Trip, Requires 3 Pole Spaces |
Product FAQs
8 answersWhat load centers are compatible with the BR245ST?
This plug-on breaker is designed for use in Eaton Type BR load centers. It is also backward compatible with older Bryant, Challenger, and Westinghouse load centers that accept Type BR breakers.
What does the ST suffix in the BR245ST catalog number indicate?
The ST indicates that this breaker includes a factory-installed shunt trip mechanism. This allows the breaker to be tripped remotely by applying a voltage signal to the shunt trip coil, which is commonly used for emergency stop or remote shutdown applications.
How many panel spaces does the BR245ST require?
Although it is a 2-pole breaker, the factory-installed shunt trip mechanism adds an extra pole of width. Therefore, this breaker requires three standard 1-inch spaces in your load center.
Can I add a shunt trip to a standard BR245 breaker in the field?
No, shunt trips cannot be field-installed on Eaton BR series miniature circuit breakers. You must purchase a breaker with a factory-installed shunt trip, such as the BR245ST.
What type of terminals does this breaker have and what wire sizes do they accept?
It features box lug terminals that accept 14 to 4 AWG copper or aluminum conductors.
Can this breaker be used in systems with a fault current higher than 10,000 amps?
No, this breaker has a maximum interrupting rating of 10 kAIC at 120/240VAC. If your system has an available fault current exceeding 10,000 amps, you will need a breaker with a higher interrupting capacity to ensure safe operation.
What type of protection does the BR245ST provide?
This thermal-magnetic breaker provides both long-time and instantaneous trip functions. The thermal element protects against sustained overloads, while the magnetic element provides instantaneous protection against short circuits.
Is the BR245ST a direct replacement for older Bryant or Westinghouse breakers?
Yes, Eaton BR series breakers are the direct replacements for legacy Bryant, Challenger, and Westinghouse Type BR breakers of the same amperage and configuration.
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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.