ABB / General ElectricTHHQB2150
ABB / General Electric THHQB22050 Miniature Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
ABB / General Electric
THHQB22050
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THHQB22050
Quantity
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ABB / General Electric THHQB22050 - 50A 2 Pole Miniature Circuit Breaker
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Description
Built to handle demanding electrical loads, this 50-amp miniature circuit breaker provides essential long-time and instantaneous trip functions. It installs seamlessly into GE A-Series and ReliaGear panelboards, utilizing a sturdy bolt-on mechanism that ensures a reliable connection for commercial and industrial facilities. Equipped with a visual trip indicator and an internal common trip, this 22kAIC-rated device guarantees rapid fault clearing with its quick-make/quick-break design.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THHQB |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC, 22kA @ 120/240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series 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 | Shunt Trip, Auxiliary Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 10C to 50C |
| Construction Features | HACR Rated, Reverse Feed, Quick-Make/Quick-Break, Internal Common Trip, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
6 answersWhat panelboards are compatible with the THHQB22050 circuit breaker?
This bolt-on breaker is designed for use in GE A-Series panelboards and ReliaGear lighting panelboards. It will not fit in standard residential Q-Line load centers that require plug-on breakers.
Can I use the THHQB22050 to replace a THQB22050?
Yes. The THHQB22050 shares the same physical dimensions and bolt-on mounting as the THQB22050, but it offers a higher interrupting rating of 22kAIC compared to the 10kAIC rating of the standard THQB version.
What is the difference between the THHQB22050 and the THQL2150?
The THHQB22050 is a bolt-on breaker intended for commercial panelboards, while the THQL2150 is a plug-on breaker designed for residential load centers. They are not interchangeable.
Is the THHQB22050 HACR rated for HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific overcurrent protection rating.
What are the recommended torque specifications for the box lugs on this 50A breaker?
For the THHQB22050, the required lug tightening torque depends on the wire size: 40 in-lb for #8 AWG, 45 in-lb for #6 to #4 AWG, and 50 in-lb for #3 AWG.
Does the THHQB22050 require a separate hold-down kit when used as a back-fed main breaker?
No. Because the THHQB22050 is a bolt-on breaker, it inherently requires a tool to be removed from the busbar. This satisfies the NEC 408.36(D) requirement for back-fed breakers without needing an additional hold-down kit.
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