ABB / General Electric THHQL2120ST1 Miniature Circuit Breaker
- 20A
- 2 Pole
- Plug-On
Quantity
ABB / General Electric THHQL2120ST1 - 20A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial control systems, the GE THHQL2120ST1 combines standard overcurrent protection with remote tripping functionality. This 2-pole, 20-amp breaker includes a factory-installed 120VAC shunt trip accessory. This unit installs into GE A-Series panelboards via a standard plug-on connection. The integrated shunt trip is ideal for emergency shutdown applications or automated load shedding. Rated for 22 kAIC, the breaker handles high fault currents safely.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THHQL |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 208Y/120VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 208Y/120VAC, 22kA @ 120/240VAC |
| Frame Type | THQL |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards |
| 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 | Auxiliary Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (120VAC) |
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, High Interrupting Capacity |
Product FAQs
7 answersWhat does the ST1 suffix on the THHQL2120ST1 indicate?
The ST1 suffix indicates the breaker includes a factory-installed 120VAC shunt trip. This accessory allows the breaker to be opened remotely via a control signal, which is commonly used for emergency stops or automated load shedding.
Which panelboards are compatible with this breaker?
This Q-Line plug-in breaker is designed for use in GE A-Series panelboards and standard GE load centers that accept 1-inch per pole THQL or THHQL series breakers.
What is the difference between THQL and THHQL series breakers?
THHQL breakers are the high-interrupting versions of the standard THQL line. While standard THQL breakers are typically rated at 10kAIC, THHQL models provide a 22kAIC rating at 120/240VAC for systems requiring higher fault current protection.
Does this breaker provide GFCI or AFCI protection?
No. The THHQL2120ST1 is a standard thermal-magnetic breaker with a shunt trip. It does not include ground fault or arc fault protection. GE breakers with those features typically have GFT, GFEP, or AF2 suffixes.
What is the bolt-on equivalent to this breaker?
For applications requiring a bolt-on connection rather than plug-in, the equivalent 20A, 2-pole breaker with a 120V shunt trip and 22kAIC rating is the THHQB2120ST1.
How much panel space does this 2-pole breaker require?
As a standard Q-Line breaker, it requires two 1-inch spaces in a compatible GE load center or panelboard.
What do the long-time and instantaneous trip functions do?
The long-time function provides a delayed trip to protect wiring against sustained overloads. The instantaneous function trips the breaker immediately in the event of a severe short circuit.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- TGTim G.ReviewingABB / General Electric THHQL32020 - 20A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars2/17/22great service!
great service!