ABB / General Electric THHQL22020ST1 Molded Case Circuit Breaker
- 20A
- 2 Pole
- Plug-On
Quantity
ABB / General Electric THHQL22020ST1 - 20A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the Q-Line family, the THHQL22020ST1 is a 2-pole, 20A molded case circuit breaker built for commercial power distribution. It features a factory-installed 120VAC shunt trip for remote shutdown capabilities. This plug-on breaker installs into GE PowerMark Gold load centers and A-Series panelboards, accepting 14-8 AWG copper wire. Rated for 22kAIC at 240VAC, it provides reliable thermal-magnetic protection and is HACR rated for HVAC motor loads.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THHQL |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | THQL |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE PowerMark Gold Load Centers, 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 |
Product FAQs
6 answersWhich GE panels accept the THHQL22020ST1 breaker?
It is compatible with GE PowerMark Gold load centers and GE A-Series panelboards. It snaps into standard 1-inch Q-Line bus connections.
What function does the ST1 suffix provide on this breaker?
The ST1 designation means this breaker is equipped with a 120VAC shunt trip. This allows for remote tripping of the breaker when a 120V signal is applied to the accessory leads, commonly used for emergency stop or fire alarm integration.
How does the THHQL series differ from standard THQL breakers?
THHQL breakers provide a higher maximum interrupting capacity of 22kAIC at 240VAC, compared to the standard 10kAIC rating of THQL models. This makes them suitable for commercial applications or residential services with higher available fault currents.
What are the acceptable wire gauges for the THHQL22020ST1 terminals?
The box lugs accommodate 14 to 8 AWG copper conductors or 12 to 8 AWG aluminum conductors. Ensure proper torque specifications are followed during installation.
Can this breaker replace a standard THHQL22020?
Yes, it will physically fit and provide the same 20A thermal-magnetic protection and 22kAIC rating. However, the ST1 version includes a shunt trip accessory. If your system does not require remote tripping, the standard THHQL22020 is the direct replacement.
Does this breaker provide GFCI or AFCI protection?
No, the THHQL22020ST1 features standard thermal-magnetic trip functions for overload and short-circuit protection. It does not include ground fault or arc fault circuitry.
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