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Eaton / Cutler-Hammer BR315ST Miniature Circuit Breaker
- 15A
- 3 Pole
- Plug-On
Eaton / Cutler-Hammer
BR315ST
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR315ST
Quantity
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Eaton / Cutler-Hammer BR315ST - 15A 3 Pole Miniature Circuit Breaker
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Description
Part of the BR series, this 15-amp, 3-pole miniature circuit breaker is designed for residential and commercial power distribution. It delivers reliable thermal-magnetic protection for 240V applications requiring remote shutdown capabilities. The unit installs into Eaton Type BR load centers and serves as an exact fit for legacy Bryant, Challenger, and Westinghouse panels. Because of the integrated accessory, the breaker requires four 1-inch pole spaces for proper mounting.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR315ST |
| Series | BR |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | BR |
|---|---|
| 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 4 Pole Spaces |
Product FAQs
7 answersWhat does the "ST" suffix indicate on the BR315ST circuit breaker?
The "ST" suffix indicates that the breaker is equipped with a factory-installed shunt trip, which allows the breaker to be opened remotely using a control signal.
Can I field-install a shunt trip on a standard BR315 breaker?
No, shunt trips cannot be field-installed on Eaton BR series miniature circuit breakers. You must purchase a unit with a factory-installed shunt trip, such as the BR315ST.
How many panel spaces does the BR315ST require?
The BR315ST requires four 1-inch panel spaces. The 3-pole breaker takes up three spaces, and the integrated shunt trip requires one additional space.
What voltage is required to activate the shunt trip on the BR315ST?
The factory-installed shunt trip on Eaton BR series breakers requires a 120VAC control voltage to activate and trip the breaker remotely.
Can the BR315ST be used to replace older Bryant or Westinghouse breakers?
Yes, Eaton Type BR breakers are exact replacements for legacy Bryant, Challenger, and Westinghouse plug-on circuit breakers.
Can I install this 3-pole breaker in a standard residential single-phase panel?
No, the BR315ST is a 3-pole breaker that requires a 3-phase load center. It cannot be properly installed in a standard single-phase residential panel.
Is the BR315ST rated for HVAC applications?
Yes, all Eaton Type BR 3-pole circuit breakers carry a Heating, Air Conditioning, and Refrigeration (HACR) listing.
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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.