ABB / General Electric THHQB32050ST1 Miniature Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Quantity
ABB / General Electric THHQB32050ST1 - 50A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for commercial applications, the GE THHQB32050ST1 is a 3-pole, 50A miniature circuit breaker with a factory-installed 120VAC shunt trip. This accessory allows users to remotely open the circuit for emergency shutdowns. The device installs into GE A-Series, AQ Series, and ReliaGear panelboards. Its bolt-on mounting provides a highly reliable connection to the bus. Delivering a 22 kAIC rating at 240VAC, this Q-Line breaker features an internal common trip to prevent single-phasing.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THHQB |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, GE AQ Panelboards, ReliaGear 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 | Auxiliary Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (120VAC) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Non-Interchangeable Trip, Quick-Make/Quick-Break, Reverse Feed |
Product FAQs
6 answersWhich panelboards are compatible with the THHQB32050ST1 circuit breaker?
This bolt-on breaker is designed for use in GE A-Series, GE AQ, and ABB ReliaGear panelboards that accept THQB frame breakers.
What does the ST1 suffix indicate on the THHQB32050ST1 catalog number?
The ST1 suffix indicates that this breaker is factory-equipped with a 120VAC shunt trip accessory, which allows the breaker to be tripped remotely via an external control signal.
What is the difference between THHQB and standard THQB breakers?
The H in the THHQB prefix designates a higher interrupting capacity. The THHQB32050ST1 is rated for 22kAIC at 240VAC, while standard THQB breakers are typically rated at 10kAIC.
Will the THHQB32050ST1 be branded as ABB or General Electric?
Following ABB's acquisition of GE Industrial Solutions, Q-Line breakers may be branded as either ABB or GE. Both versions are identical in form, fit, and function, and serve as exact replacements for existing installations.
How does the THHQB32050ST1 connect to the panelboard bus?
This breaker utilizes a bolt-on connection type. It must be physically bolted to the panelboard bus bars, providing a secure connection suitable for commercial and industrial environments, unlike plug-in THQL variants.
Does the THHQB32050ST1 provide ground fault or arc fault protection?
No. This is a standard thermal magnetic breaker providing long-time and instantaneous overcurrent and short-circuit protection. It does not include GFCI or AFCI capabilities.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
- JLJames L. L.Verified BuyerReviewingABB / General Electric THHQB21100 - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/6/26ABB / General Electric THHQB21100
Fast Service and delivery, The breaker was as described and brand new! Great pricing and great Service. I paid extra for UPS ground, it was delivered quickly.
- SNScott N.Verified BuyerReviewingABB / General Electric THHQB32030 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/30/25Perfect
The correct breaker the first time - every time.
- AGAlejandra G.Verified BuyerReviewingABB / General Electric THHQB1140 - 40A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Everithing is good!
Everithing is good!
- LMLuis M.ReviewingABB / General Electric THHQB2145 - 45A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/19/23Good product and good service
Good product and good service
- SHScott H.ReviewingABB / General Electric THHQB2180 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/21/2280amp commercial breaker
Great how easy it was to order and how fast I got it. I will order one again when needed