ABB / General ElectricTEY325ST12
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Free Shipping Over $99
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ABB / General Electric TEY320ST12 Miniature Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
ABB / General Electric
TEY320ST12
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
TEY320ST12
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ABB / General Electric TEY320ST12 - 20A 3 Pole Miniature Circuit Breaker
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Description
Featuring a factory-installed 120V shunt trip, the GE TEY320ST12 enables remote disconnection of electrical circuits. This 3-pole, 20A miniature circuit breaker provides reliable protection for commercial systems. The unit mounts into GE A-Series panelboards using a sturdy bolt-on configuration. It comes standard with load side lugs that accept 14-8 AWG copper or 12-8 AWG aluminum conductors. With an interrupting capacity of 14 kAIC at 480Y/277V, it handles demanding fault conditions.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | TEY320ST12 |
| Series | TEY |
| Amperage | 20A |
| 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 Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Undervoltage Release, Padlock Attachment, Handle Lock |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| 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, Non-Interchangeable Trip |
Product FAQs
8 answersWhat does the ST12 suffix mean on the TEY320ST12 breaker?
The ST12 suffix indicates that this breaker includes a factory-installed shunt trip with a 120 to 277 VAC control voltage. This allows the breaker to be tripped remotely using an external voltage signal, which is commonly required for emergency shutdown systems.
Which panelboards are compatible with the TEY320ST12 circuit breaker?
This bolt-on miniature circuit breaker is designed specifically for use in GE A-Series panelboards. It will not fit in standard residential plug-on load centers.
What are the wire gauge requirements for the TEY320ST12?
The factory lugs accept 14 to 8 AWG copper or 12 to 8 AWG aluminum wire. Because this breaker is often used in commercial lighting and distribution, verify that your conductor material and sizing align with local electrical codes for a 20-amp circuit.
How does the shunt trip function operate on the TEY320ST12?
The factory-installed ST12 shunt trip requires an external 120 to 277 VAC control voltage signal. When voltage is applied to the shunt trip coil, it mechanically trips the breaker to open the circuit. The breaker must be manually reset after the shunt trip is activated.
Is the trip unit on the TEY320ST12 adjustable?
No, this breaker features a fixed thermal magnetic trip unit with long-time and instantaneous (LI) trip functions. The 20-amp trip point cannot be adjusted in the field.
Can I add field-installable internal accessories to the TEY320ST12?
The TEY320ST12 already includes a factory-installed shunt trip. For GE TEY frame breakers, internal accessories such as shunt trips and auxiliary switches are factory-installed only and cannot be added or swapped in the field.
Is the TEY320ST12 rated for direct current applications?
Yes, in addition to its AC ratings, this 3-pole breaker is rated for up to 250 VDC with an interrupting capacity of 10 kAIC, making it suitable for specific DC control or distribution circuits.
How is the TEY320ST12 installed in a panelboard?
The TEY320ST12 is a bolt-on breaker that fastens directly to the busbar of a GE A-Series panelboard using mounting screws. This bolt-on design ensures a secure, vibration-resistant connection compared to standard plug-on breakers.
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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!