ABB / General ElectricTHQB32030
ABB / General Electric THQB31WY30 Miniature Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
ABB / General Electric
THQB31WY30
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB31WY30
Quantity
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ABB / General Electric THQB31WY30 - 30A 3 Pole Miniature Circuit Breaker
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Description
Part of GE's Q-Line family, this three-pole, 30A miniature circuit breaker features a factory-configured switching neutral for specialized commercial applications. The bolt-on design mounts into GE A-Series panelboards and AQ lighting panels. It accepts 14-8 AWG copper or 12-8 AWG aluminum wiring via standard box lugs. Rated for 10kAIC at 120/240VAC, it provides fixed thermal-magnetic LI protection. The HACR-rated unit includes an internal common trip and quick-make/quick-break mechanism.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQB |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Switching Neutral (Factory Configuration) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Quick-Make/Quick-Break, Switching Neutral |
| Special Features | Switching Neutral |
Product FAQs
5 answersWhat does the WY suffix indicate on the THQB31WY30 part number?
The WY suffix designates this as a switching neutral circuit breaker. While it occupies three panel spaces, it functions as a 2-pole breaker with an additional pole dedicated to disconnecting the neutral conductor simultaneously with the ungrounded conductors.
Can the THQB31WY30 be installed in a standard plug-on load center?
No. This breaker features a bolt-on connection and must be bolted directly to the busbar. It is specifically designed for use in GE A-Series Panelboards and GE AQ Lighting Panels, and will not fit in plug-on load centers.
When is a switching neutral breaker like the THQB31WY30 required?
Switching neutral breakers are utilized in specific applications where the National Electrical Code (NEC) mandates that all conductors, including the grounded neutral, must be completely disconnected from the circuit to ensure safety during maintenance or a fault condition.
Can I use the THQB31WY30 to protect a standard 3-phase circuit?
No. Although it is built on a 3-pole frame, this breaker is designed for 120/240VAC single-phase applications that require two ungrounded conductors and one switched neutral. It is not intended for standard 3-phase power distribution.
How does the THQB31WY30 indicate a tripped condition?
The breaker features a center-trip handle mechanism. When a fault or overload occurs, the operating handle moves to a distinct center position between the ON and OFF positions, making it easy to visually identify a tripped breaker in the panel.
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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.