ABB / General ElectricTHQL32030ST1
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ABB / General Electric THQL32050ST1 Miniature Circuit Breaker
- 50A
- 3 Pole
- Plug-On
ABB / General Electric
THQL32050ST1
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQL32050ST1
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ABB / General Electric THQL32050ST1 - 50A 3 Pole Miniature Circuit Breaker
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Description
Built for commercial applications, the GE THQL32050ST1 is a 3-pole, 50A miniature circuit breaker. It features a factory-installed 120VAC shunt trip mechanism, allowing the unit to be tripped remotely for emergency stops or automated control. This Q-Line breaker installs into GE PowerMark Gold load centers and A-Series panelboards using a standard plug-on mounting style. Rated at 10 kAIC, it includes an internal common trip bar and is HACR rated for HVAC equipment.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQL32050ST1 |
| Series | THQL |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | THQL |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE PowerMark Gold Load Centers, GE A-Series Panelboards |
| Wire Gauge | 8-3 AWG (Cu), 8-3 AWG (Al) |
| Max Wire | 3 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (120VAC) |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 10C to 50C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break |
Product FAQs
8 answersWhat panels are compatible with the THQL32050ST1 breaker?
It installs into GE PowerMark Gold load centers and GE A-Series panelboards. Because it includes a shunt trip module, verify that your specific panel enclosure has adequate wire bending space for the additional 120V AC control wiring required for remote operation.
What does the ST1 suffix indicate on this GE breaker?
The ST1 suffix designates a factory-installed 120V AC shunt trip. This allows the breaker to be opened remotely by an external control signal, such as an emergency stop button, fire alarm interface, or control relay.
How much panel space does the THQL32050ST1 require?
As a standard 1-inch per pole Q-Line breaker, this 3-pole unit requires three inches of continuous space on the panel bus.
Can I substitute a THQB32050ST1 for this model?
No. While both are 50A, 3-pole breakers with a 120V shunt trip, the THQB version features a bolt-on mounting style. The THQL32050ST1 is a plug-on breaker. You must match the mounting style to your panel bus design.
What are the wiring requirements for the THQL32050ST1?
The primary box lugs accept 8 AWG to 3 AWG copper or aluminum conductors. You will also need to route separate control wiring to the shunt trip coil to enable the remote trip functionality.
Is this breaker suitable for HVAC equipment?
Yes, GE Q-Line breakers like the THQL32050ST1 are HACR rated, making them suitable for heating, air conditioning, and refrigeration circuits that require a 50A, 3-pole disconnect with remote trip capabilities.
Does this breaker provide ground fault or arc fault protection?
No. The THQL32050ST1 provides standard thermal-magnetic overcurrent and short-circuit protection, along with the shunt trip feature. It does not include GFCI or AFCI protection, which would be indicated by GFT, GFEP, or AF2 suffixes.
Will this breaker match my existing GE panel if it arrives branded as ABB?
Yes. ABB acquired GE Industrial Solutions in 2018 and continues to manufacture the Q-Line breaker family under the same THQL catalog numbers. An ABB branded THQL32050ST1 is an exact drop-in replacement for a legacy GE branded unit.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 90 reviews.
Total 5 star reviews: 88 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Generated by AI from 78 most recent customer reviews
Last updated 8/5/25
Customers say these circuit breakers arrive quickly and fit their electrical panels perfectly. Many reviews mention competitive pricing compared to local suppliers. Frequent comments address the secure packaging and prompt delivery. Reviews highlight the exact match to specifications and ease of installation. The selection receives particular praise, especially for hard-to-find models.
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Rating
90 reviews
- KLKim L.Verified BuyerReviewingABB / General Electric THQL2130 - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/6/26Circuit Breaker
Thank you for your fast efficient service! We had a power outage and several power surges that took out our breaker. Fast easy inexpensive repair!!
- RHRussell H.Verified BuyerReviewingABB / General Electric THQL1120GF - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/20/26Hard To Find
Had an old breaker that was hard to find but they had it and at a reasonable price!
- JBJeff B.Verified BuyerReviewingABB / General Electric THQL32030 - 30A 3 Pole Miniature Circuit BreakerRated 3 out of 5 stars7/14/26No paperwork
Part arrived, would have been nice to receive a packing slip or something in the box beside the part.
- SNScott N.Verified BuyerReviewingABB / General Electric THQL32100 - 100A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/26Owner
Worked great, breaker was the exact match
- JDJerry D.Verified BuyerReviewingABB / General Electric THQL32050 - 50A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/19/26Best place to get great prices on 3pole breakers
i have bought from super breakers before & when i need these for a job i know they will be great. i buy to restock my truck.