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Eaton / Cutler-Hammer BR350ST Miniature Circuit Breaker
- 50A
- 3 Pole
- Plug-On
Eaton / Cutler-Hammer
BR350ST
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BR350ST
Quantity
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Eaton / Cutler-Hammer BR350ST - 50A 3 Pole Miniature Circuit Breaker
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Description
Part of the Type BR family, the Eaton BR350ST integrates a 120V shunt trip mechanism for remote disconnect applications in commercial and industrial settings. This 50-amp, 3-pole plug-on circuit breaker delivers reliable thermal-magnetic protection with a 10kAIC rating at 240VAC. Because of the side-mounted shunt trip accessory, the unit requires four one-inch spaces within Eaton BR load centers. It features a common trip function and accepts 14-4 AWG wire for secure electrical connections.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BR350ST |
| Series | BR |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | BR |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Type BR 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 Thermal, Fixed Magnetic |
| 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
8 answersWhat does the "ST" suffix indicate on the BR350ST circuit breaker?
The "ST" suffix means the breaker is equipped with a factory-installed 120VAC shunt trip accessory. This allows the breaker to be tripped remotely, which is commonly required for emergency stop or remote disconnect applications.
How many panel spaces are required to install the BR350ST?
This breaker requires four 1-inch spaces in your load center. The 3-pole breaker itself occupies three spaces, and the attached side-mounted shunt trip mechanism requires one additional space.
Can I add a shunt trip to an existing BR350 breaker in the field?
No. Eaton does not permit field installation of shunt trips on Type BR miniature circuit breakers. You must purchase a unit with the shunt trip factory-installed, such as the BR350ST.
What control voltage is needed to operate the shunt trip on this breaker?
The shunt trip mechanism on the BR350ST requires a 120VAC control voltage signal to activate and trip the breaker remotely.
Which load centers are compatible with the BR350ST?
This breaker is compatible with Eaton, Cutler-Hammer, and legacy Bryant Type BR load centers, provided the panel has four available 1-inch spaces and supports 3-pole configurations.
Can the BR350ST be used in older Westinghouse or Bryant panels?
Yes, Eaton Type BR breakers are backward compatible with legacy Cutler-Hammer, Bryant, and Westinghouse load centers that accept standard Type BR plug-on breakers.
Are the trip settings adjustable on the BR350ST?
No, this breaker features fixed thermal and fixed magnetic trip settings for both long-time and instantaneous protection.
Does the BR350ST provide arc fault or ground fault protection?
No, the BR350ST is a standard thermal-magnetic circuit breaker with a shunt trip. It does not include AFCI or GFCI protection circuitry.
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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.