ABB / General ElectricTEY360ST12
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ABB / General Electric TEY350ST12 Miniature Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
ABB / General Electric
TEY350ST12
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
TEY350ST12
Quantity
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ABB / General Electric TEY350ST12 - 50A 3 Pole Miniature Circuit Breaker
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Description
Part of the Q-Line family, the GE TEY350ST12 is a 3-pole, 50A miniature circuit breaker for commercial power distribution. It features a factory-installed 120-277VAC shunt trip for remote tripping capabilities. This bolt-on breaker installs into GE A-Series, AE, and AS lighting panelboards. It accepts 10-4 AWG wire via included load side lugs. Rated for 14kAIC at 480Y/277VAC, the unit utilizes standard thermal-magnetic trip technology for long-time and instantaneous protection.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | TEY350ST12 |
| Series | TEY |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC, 250VDC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 14kA @ 480Y/277VAC, 10kA @ 250VDC, 65kA @ 120/240VAC |
| Frame Type | TEY |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE A-Series Lighting Panelboards, GE AE Lighting Panelboards, GE AS Lighting Panelboards |
| Wire Gauge | 10-4 AWG (Cu/Al) |
| Max Wire | 4 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Mounting Base |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5.1, UL 489 |
| Approval | CSA, HACR, HID, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Common Trip, Quick-Make/Quick-Break |
Product FAQs
6 answersWhich panelboards accept the TEY350ST12 circuit breaker?
The TEY350ST12 is a bolt-on branch breaker designed specifically for GE A-Series, AE, and AS lighting panelboards. It is not compatible with standard residential plug-on load centers.
What functionality does the ST12 suffix add to the TEY350ST12?
The ST12 suffix denotes a factory-installed 120-277VAC shunt trip accessory. This allows the breaker to be tripped remotely via an external voltage signal, commonly used for emergency stops or automated control systems.
Can I replace a standard TEY350 with the TEY350ST12?
Yes, the TEY350ST12 shares the exact same physical dimensions and bolt-on mounting as a standard TEY350. However, it includes a factory-installed shunt trip which requires additional control wiring if you intend to use the remote tripping feature.
Why might my TEY350ST12 breaker arrive with ABB branding instead of GE?
Following ABB's acquisition of GE Industrial Solutions, TEY frame breakers may carry either ABB or General Electric branding. The products are identical in form, fit, function, and UL listings regardless of the label.
How does the interrupting rating change based on system voltage?
While commonly applied in 480Y/277VAC commercial systems where it provides 14kAIC of protection, the TEY350ST12 is also fully rated for 65kAIC when installed in 120VAC, 240VAC, or 120/240VAC applications.
What does the LI trip function code mean on this breaker?
The LI designation indicates that the breaker provides Long-Time overload protection and Instantaneous short-circuit protection. This is the standard thermal-magnetic protection profile for general commercial power distribution.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 43 reviews.
Reviews Summary
Generated by AI from 43 most recent customer reviews
Last updated 9/22/26
Customers say these circuit breakers arrive quickly and function as described. Many reviews highlight fast shipping, often within 48 hours, and reasonable pricing compared to local alternatives. Users appreciate the extensive inventory and ability to find hard-to-locate models in stock. The ordering process is described as straightforward, and products consistently arrive well-packaged and as advertised. Common feedback addresses knowledgeable staff and reliable service. A few customers note that shipping tracking information could be more detailed, though delivery timeliness remains consistent across reviews.
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Rating
43 reviews
- SAShaenon A.Verified BuyerReviewingGeneral Electric TEYL1030B 1 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Everything was great!
Super easy and love the options and simple descriptions! Reasonable pricing too will ensure we are a reoccurring customer!
- MJmartin j.Verified BuyerReviewingABB / General Electric TEY320 - 20A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/26/26breaker replacement
fast service and great pricing .. Had this business up and running in No time ,, highly recommend SB
- CMCharles M.Verified BuyerReviewingABB / General Electric TEY320 - 20A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/4/26Just what I needed.
Received as advertised, and at a good price on time. Very satisfied.
- AMAlex M.Verified BuyerReviewingABB / General Electric TEY340 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars5/12/26SuperBreakers are great.
Another breaker ordered. Arrived on time and fulfilled.
- AMAlex M.Verified BuyerReviewingABB / General Electric TEY130 - 30A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars5/12/26Breaker Ordered
Shipped correctly and on time. We will continue to use SuperBreakers!