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ABB / General Electric THQB2140ST1 - 40A 2 Pole Miniature Circuit Breaker

Brand ABB / General Electric
SKU THQB2140ST1
4.9
Rated 4.9 out of 5 stars
102 Reviews
General Electric THQB2140ST1 Shunt Trip
Free Shipping Over $99

ABB / General Electric THQB2140ST1 - 40A 2 Pole Miniature Circuit Breaker

Brand ABB / General Electric
SKU THQB2140ST1
4.9
Rated 4.9 out of 5 stars
102 Reviews
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General Electric THQB2140ST1 Shunt Trip

ABB / General Electric THQB2140ST1 - 40A 2 Pole Miniature Circuit Breaker

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$191.40 No stock

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DescriptionSpecificationsSuperClubWarranties
Description
Designed for advanced control applications, this 40A miniature circuit breaker combines standard thermal-magnetic protection with remote tripping capabilities. The bolt-on form factor mounts into GE A-Series, AQ lighting, and ReliaGear RQ panelboards, ensuring a rigid and dependable electrical connection. A factory-installed 120/240VAC shunt trip accessory enables automated shutdown from remote switches or emergency stop buttons, complementing its 10kAIC rating.

Specifications

Brand ABB / General Electric
Series THQB
Part Number THQB2140ST1
Amperage 40A
Voltage 120/240VAC
Poles 2
Phase 1
AIC Rating 10kA @ 120/240VAC
Mounting Style Bolt-On
Terminal Type Box Lugs
For Use With GE A-Series Panelboards, GE AQ Lighting Panels, ReliaGear RQ Panelboards
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Wire Gauge 8-3 AWG (Cu/Al)
Max Wire 3 AWG
Min Wire 8 AWG
Available Options Auxiliary Switch, Undervoltage Release, Padlock Attachment, Alarm Switch
Accessories Load Side Lugs Included, Shunt Trip (Factory Installed)
Standards CSA C22.2 No. 5, NEMA AB 1, UL 489
Approval CSA, HACR, UL
Temp Rating 40C
Construction Features HACR Rated, Common Trip, Quick-Make/Quick-Break, Non-Interchangeable Trip

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Warranties

We’ve got you covered!

When shopping with SuperBreakers, you’ll have peace of mind knowing that every single item you purchase includes a 60 day warranty, free of charge. Why such confidence? Because only the highest quality electrical parts have a place on our shelves, and we stand by every single one we sell.

If anything goes wrong with your item that is not a result of misuse or normal wear and tear, we’ll gladly replace it at no cost to you.

Click here to read our full warranty details

Shipping

Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

Click here to read our full shipping policy
Same Day Shipping

We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments

Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

4.9
Rated 4.9 out of 5 stars
Based on 102 reviews
Total 5 star reviews: 97 Total 4 star reviews: 4 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
Reviews Summary
Customers say these circuit breakers arrive quickly and work as expected. Many reviews mention fast shipping, with some receiving orders overnight or within days. Users report the breakers fit properly, install easily, and function correctly in both residential and commercial applications. Common feedback includes competitive pricing and good packaging that protects products during shipping. While most praise the ordering process as straightforward, some note occasional issues with missing installation screws or receiving updated product versions instead of pictured models. Several contractors and electricians appreciate having access to hard-to-find or obsolete breakers when local suppliers lack inventory.
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102 reviews
  • AM
    Alex M.
    Verified Buyer
    Reviewing
    ABB / General Electric THQB2130ST1 - 30A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    4/15/26
    Excellent Service

    SuperBreakers shipped exactly what we ordered. We signed up for expedited delivery and received the shipment with enough time to install the breaker and power up equipment before the project was to be commissioned. We will definitely be using SuperBreakers again. Thank you so much for helping our team complete another successful project.

    Was this helpful?
  • KK
    Kurt K.
    Verified Buyer
    Reviewing
    ABB / General Electric THQB32035 - 35A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    4/14/26
    Fast Shipping

    The breaker came overnight. I didn't pay for extra shipping either. It was helpful because I was able to get the job done without making a special trip.

    Was this helpful?
  • DR
    David R.
    Verified Buyer
    Reviewing
    ABB / General Electric THQB2160 - 60A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    4/14/26
    2 P 60 THQB2160

    QUCK SHIPPING, FAIR PRICE.

    Was this helpful?
  • AR
    Alexander R.
    Verified Buyer
    Reviewing
    ABB / General Electric THQB2120 - 20A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    4/8/26
    BREAKERS!

    BEST BREAKER IN TOWN!

    Was this helpful?
  • BP
    BJ P.
    Verified Buyer
    Reviewing
    ABB / General Electric THQB2130 - 30A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    4/1/26
    THQB2130 - 30A 2 Pole Miniature Circuit Breaker

    The item arrived quickly, was well packaged, and worked perfectly as expected.

    Installation was easy, and the breaker fits well and saves space with its duplex design.

    Was this helpful?

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