ABB / General ElectricTHQL2160ST1
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ABB / General Electric THQL2170ST1 Miniature Circuit Breaker
- 70A
- 2 Pole
- Plug-On
ABB / General Electric
THQL2170ST1
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQL2170ST1
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ABB / General Electric THQL2170ST1 - 70A 2 Pole Miniature Circuit Breaker
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Description
Featuring an integrated 120VAC shunt trip mechanism, this 70-amp commercial breaker enables remote tripping for emergency shutdowns or automated control. It provides standard thermal-magnetic protection. The plug-on module mounts into GE A-Series panelboards and standard Q-Line load centers. It utilizes box lug terminals accepting up to 1/0 AWG conductors. Delivering a 10kA interrupting capacity, this unit includes an internal common trip and a quick-make, quick-break design.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQL2170ST1 |
| Series | THQL |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | THQL |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE Q-Line Load Centers, GE A-Series Panelboards |
| Wire Gauge | 6-1/0 AWG (Cu), 4-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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 | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, Quick-Make/Quick-Break |
Product FAQs
7 answersWhat does the ST1 suffix mean in the THQL2170ST1 part number?
The ST1 suffix designates a factory-installed 120VAC shunt trip. This integrated mechanism allows the breaker to be tripped remotely via an external signal, which is commonly used for emergency shutdowns or automated control systems.
Which electrical panels accept the THQL2170ST1 breaker?
This breaker is compatible with GE Q-Line load centers and GE A-Series panelboards that accept 1-inch per pole plug-on breakers.
Can I use the THQL2170ST1 in a panel that requires bolt-on breakers?
No. The THQL frame is strictly for plug-on mounting. If your GE panelboard requires bolt-on connections, you must source the equivalent THQB series breaker instead.
Does this breaker require a separate control voltage for the shunt trip?
Yes, the factory-installed shunt trip requires a 120VAC control voltage source to actuate the remote trip mechanism.
What wire sizes and materials are compatible with the terminals?
The box lugs accept 6 AWG to 1/0 AWG copper conductors, or 4 AWG to 1/0 AWG aluminum conductors. Ensure the wire is sized appropriately for the 70A load and terminated to the manufacturer specified torque.
How does the thermal-magnetic trip unit function on this breaker?
The thermal-magnetic mechanism provides dual protection. The thermal element responds to sustained overloads with a time delay, while the magnetic element trips instantaneously in the event of a short circuit.
Can this breaker be installed in systems with an available fault current above 10,000 amps?
No, the THQL2170ST1 has a maximum interrupting rating of 10kAIC at 240V. For systems requiring a higher interrupting capacity, you must use a fully rated or series-rated alternative like the THHQL series, which offers 22kAIC.
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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.