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Eaton / Cutler-Hammer BR370ST Miniature Circuit Breaker
- 70A
- 3 Pole
- Plug-On
Eaton / Cutler-Hammer
BR370ST
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR370ST
Quantity
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Eaton / Cutler-Hammer BR370ST - 70A 3 Pole Miniature Circuit Breaker
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Description
Integrating remote tripping capabilities, this 70-amp miniature breaker includes a built-in shunt trip mechanism for specialized commercial and residential safety requirements. The three-pole unit snaps securely into Eaton BR, Bryant, Challenger, and Westinghouse load centers without requiring specialized hardware. Rated for 10kAIC at 240VAC, it provides robust thermal-magnetic defense alongside its remote-actuation features.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR370ST |
| Series | BR |
| Amperage | 70A |
| 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 | 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 to 75C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
6 answersWhat does the "ST" suffix indicate on the BR370ST breaker?
The "ST" designates a factory-installed shunt trip. This allows the breaker to be tripped remotely via a control signal, which is typically used for emergency stops or automated safety shutdowns.
Can I add a field-installable shunt trip to a standard BR370 breaker?
No. Shunt trips for Eaton BR series miniature circuit breakers cannot be field-installed. You must purchase a breaker with a factory-installed shunt trip, such as the BR370ST.
How much panel space does the BR370ST require?
Because of the factory-installed shunt trip, this breaker requires one additional 1-inch pole space. As a 3-pole breaker with a shunt trip, it will occupy a total of four 1-inch spaces on the load center bus.
What control voltage is needed to activate the shunt trip on the BR370ST?
The shunt trip coil on Eaton BR series miniature circuit breakers is designed to operate on a 120VAC control signal.
Is the BR370ST rated for HVAC equipment?
Yes, Eaton Type BR molded case circuit breakers carry a HACR (Heating, Air Conditioning, and Refrigeration) rating, making them suitable for protecting motor loads in HVAC applications.
Can the BR370ST be used as a back-fed main breaker?
Yes, Type BR breakers can be used as main disconnects. However, when used as a back-fed main, the National Electrical Code requires the breaker to be secured to the panel bus with an approved hold-down retainer kit.
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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.