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ABB / General Electric THQB1120GFEP GFEP Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
ABB / General Electric
THQB1120GFEP
GFEP Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB1120GFEP
Quantity
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ABB / General Electric THQB1120GFEP - 20A GFEP Miniature Circuit Breaker
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Description
Operating at a 30mA trip threshold, this 20A single-pole breaker provides dedicated ground fault equipment protection. It is designed for commercial applications to prevent machinery damage. The bolt-on mounting style ensures a rigid connection within GE A-Series panelboards and AQ lighting panels. Load side lugs accept 14-8 AWG copper or 12-8 AWG aluminum conductors. With a 10kAIC capacity at 120V, this thermal-magnetic breaker carries both HACR and SWD ratings.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB1120GFEP |
| Series | THQB |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, GE AQ Lighting Panels |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFEP |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Padlock Attachment |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
6 answersWhat is the difference between this GFEP breaker and a standard GFCI?
The THQB1120GFEP is a Ground Fault Equipment Protection (GFEP) breaker with a 30mA trip threshold, designed to protect machinery and heat trace equipment from low-level faults without nuisance tripping. Standard GFCI breakers have a highly sensitive 5mA threshold intended for personnel protection.
Can I install the THQB1120GFEP in a standard GE residential load center?
No. This is a THQB frame breaker, which uses a bolt-on connection designed for commercial GE A-Series panelboards and AQ lighting panels. Standard residential GE load centers require THQL frame plug-in breakers.
How does the pigtail neutral work on this breaker?
The attached pigtail wire must be routed and secured to the neutral bus bar in your panelboard. This connection powers the internal ground fault sensing circuitry, which is required for the equipment protection to function.
Is this breaker acceptable for bathroom or kitchen receptacle circuits?
No. Electrical codes require Class A GFCI protection (5mA trip level) for personnel in wet areas like bathrooms and kitchens. This 30mA GFEP breaker is strictly for equipment protection.
What types of equipment is this 30mA breaker typically used for?
GFEP breakers are commonly installed to protect outdoor heat trace cables, snow melting equipment, industrial pumps, and dedicated machinery where a standard 5mA GFCI would be prone to nuisance tripping.
Does this breaker provide standard overload and short-circuit protection?
Yes. In addition to the 30mA ground fault sensing, the THQB1120GFEP includes standard thermal-magnetic mechanisms for long-time (overload) and instantaneous (short-circuit) trip functions.
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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.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 110 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 4/16/26
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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Rating
110 reviews
- SPSarah P.Verified BuyerReviewingABB / General Electric THQB1120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Exactly as Described
These are so hard to find at a good price. Will be ordering again.
- SBSeth B.Verified BuyerReviewingABB / General Electric THQB1120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/8/26Hard to find older style breakers
I am pleased to have access to these breakers. We have a number of them at our church. Local suppliers said that they had never seen this kind of breaker. They fit our panel perfectly.
- TZThomas Z.Verified BuyerReviewingABB / General Electric THQB32040 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/30/26Great company
This company is awesome. Every time I call them and I need help with something. They’re right there to help me. They’re also very knowledgeable. They go out of their way to get you the product that you need right away and not a great price.
- TDTerry D.Verified BuyerReviewingABB / General Electric THQB2130GFT - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/24/2630 AMP GFCI @ POLE
Breakers were new in box as advertised. Good turn around on orders Reasonable pricing much less than abb dealer
- LMLeslie M.Verified BuyerReviewingABB / General Electric THQB21100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/26Perfect fit.
Always timely with delivery and a perfect.fit.