ABB / General ElectricTHHQB2150
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ABB / General Electric THHQB2145 Miniature Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
ABB / General Electric
THHQB2145
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THHQB2145
Quantity
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ABB / General Electric THHQB2145 - 45A 2 Pole Miniature Circuit Breaker
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Description
Part of the robust Q-Line family, this 45A component offers dependable thermal-magnetic protection. A trip-free mechanism guarantees tripping even if the handle is held ON. Designed for seamless integration, it mounts into GE A-Series panelboards and ReliaGear lighting panels. Standard box lugs accommodate 8-3 AWG conductors. The 22kAIC interrupting capacity provides enhanced fault clearing. An internal common trip disconnects both poles simultaneously during an overload.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THHQB2145 |
| Series | THHQB |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, ReliaGear Lighting 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 | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 10C to 50C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhat panelboards are compatible with the THHQB2145 circuit breaker?
The THHQB2145 is a bolt-on Q-Line breaker designed for use in GE A-Series panelboards and ReliaGear Lighting Panelboards.
What is the difference between a standard THQB and the THHQB2145?
The "H" in THHQB indicates a high interrupting capacity. While standard THQB breakers are rated at 10kAIC, the THHQB2145 features a higher 22kAIC interrupting rating at 120/240VAC.
What are the lug tightening torque specifications for the THHQB2145?
For the box lugs on this breaker, torque to 40 in-lb for 8 AWG wire, 45 in-lb for 6 to 4 AWG wire, and 50 in-lb for 3 AWG wire.
Can the THHQB2145 be used to replace a standard THQB2145?
Yes, the THHQB2145 shares the same physical dimensions and bolt-on mounting as the THQB2145, but offers a higher 22kAIC rating. Upgrading to a higher interrupting rating is generally acceptable, but always verify your specific panel and local code requirements.
What trip functions are included in the THHQB2145?
This breaker features a non-interchangeable thermal magnetic trip unit with fixed Long-Time and Instantaneous (LI) trip functions.
How does the THHQB2145 connect to the panel bus?
It utilizes a bolt-on connection, providing a secure, vibration-resistant attachment to the panelboard bus compared to plug-in Q-Line alternatives.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
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Rating
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