ABB / General Electric TEY3100ST12 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
ABB / General Electric TEY3100ST12 - 100A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the Q-Line family, the GE TEY3100ST12 delivers 100 amps of three-pole protection for commercial and industrial applications. It installs into GE A-Series panelboards and features a bolt-on mounting style for secure electrical connections. This compact MCCB includes a factory-installed 120-277VAC shunt trip mechanism, allowing for remote tripping capabilities. Rated at 14 kAIC at 480Y/277V and 65 kAIC at 240V, it provides robust thermal-magnetic protection.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | TEY3100ST12 |
| Series | TEY |
| Amperage | 100A |
| 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 | 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 Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Bell Alarm, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip |
Product FAQs
9 answersWhich panelboards are compatible with the TEY3100ST12 circuit breaker?
This breaker is designed specifically for bolt-on installation in GE A-Series lighting panelboards.
What does the ST12 suffix mean on this specific part number?
The ST12 suffix indicates this breaker includes a factory-installed 120VAC to 277VAC shunt trip mechanism. This allows for remote tripping of the breaker when a voltage signal is applied from a control system or emergency stop circuit.
Will I receive an ABB or General Electric branded TEY3100ST12?
You may receive either brand label. Following ABB's acquisition of GE Industrial Solutions, these breakers are manufactured to the identical specifications, form factor, and safety standards, differing only in the exterior branding.
What size and type of wire is accepted by the load side terminals?
The integral load lugs on this 100-amp breaker accept 4 AWG to 1/0 AWG wire sizes. The terminals are rated for both copper (Cu) and aluminum (Al) conductors.
Can I use this 480V breaker on a standard 208V or 240V system?
Yes. While it has a maximum rating of 277/480VAC, it can be safely applied on lower voltage AC systems, as well as up to 250VDC. The interrupting capacity also increases on lower voltages, offering up to 65kAIC at 120/240VAC.
Is this circuit breaker suitable for reverse feed applications?
Yes, GE TEY series breakers are suitable for reverse feeding. This allows you to wire the line and load connections in reverse if required for specific panelboard layouts or generator interlock configurations.
Does this three-pole breaker provide simultaneous tripping?
Yes, it is built with an internal common trip bar. If an overload or short circuit occurs on any single phase, all three poles will trip simultaneously, which protects three-phase machinery from single-phasing damage.
What does the LI trip function on this breaker do?
The LI designation indicates thermal magnetic protection. The Long-Time (L) function uses a thermal element to protect against sustained overloads, while the Instantaneous (I) function uses a magnetic element to clear high-level short circuits instantly. Both settings are fixed on this frame.
Is the TEY3100ST12 rated for HVAC and refrigeration equipment?
Yes, the GE TEY family carries a UL listed HACR (Heating, Air Conditioning, and Refrigeration) rating, making it suitable for protecting multi-motor HVAC systems and compressors.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 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!