ABB 1-Pole 20A GF Circuit Brea...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$820.81
ABB 1-Pole 20A GF Circuit Breaker, 22kAIC Plug-On Neutral

ABB 1-Pole 20A GF Circuit Breaker, 22kAIC Plug-On Neutral

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Model: THHQL1120PGFT

In Stock (leaves warehouse same day if ordered before 3pm ET)

$820.81
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ABB 1-Pole 20A GF Circuit Breaker, 22kAIC Plug-On Neutral

The ABB 1-Pole 20A Ground Fault Circuit Breaker delivers dependable ground-fault protection for branch circuits in residential and commercial panelboards. Configured as a single-pole (1P) device rated for 20A, this breaker carries a 22kAIC interrupt rating for reliable short-circuit withstand capacity in demanding panel applications. Built by ABB as a plug-on neutral (PON) style breaker, it installs directly into compatible load centers for straightforward branch-circuit ground-fault upgrades or new panel builds.

Key Features

  • Pole Configuration: 1-Pole (1P) design for single-circuit ground fault protection, keeping panel space usage compact.
  • Amperage Rating: 20A rating suited to standard branch circuit loads found in residential and light commercial panels.
  • Interrupt Rating: 22kAIC short-circuit interrupt capacity for reliable fault clearing under high fault-current conditions.
  • Ground Fault Protection: Ground fault (GF) breaker function helps detect ground faults and reduce shock and fire hazards on the protected circuit.
  • Plug-On Neutral (PON): PON-style termination for straightforward, code-recognized installation into compatible plug-on neutral panelboards.
  • ABB Build Quality: Manufactured by ABB for use in professional electrical distribution equipment where consistent performance is expected.
  • Single-Unit Packaging: Packaged 1 EA for straightforward stocking and replacement on service calls.

Technical Specifications

  • Amperage Rating: 20A

Typical Applications

  • Residential and Commercial Panelboards
  • Ground Fault Circuit Protection on Branch Circuits
  • Load Center Branch Circuit Wiring
  • New Construction and Panel Upgrades
  • Renovation and Retrofit Electrical Projects
  • Circuits Requiring 22kAIC Short-Circuit Interrupt Capacity

Why ABB?

ABB circuit breakers are built to deliver consistent, code-compliant performance in electrical distribution equipment. With a 1-Pole, 20A configuration and a 22kAIC interrupt rating, this ground fault breaker provides reliable, panel-ready protection for professional electrical installations where dependable fault interruption and straightforward plug-on neutral installation both matter. Choosing ABB means specifying a breaker built for the everyday demands of panelboard service, from new construction to retrofit and maintenance work on existing electrical systems.

Manufacturer Resources

Product Specs

Product Type:
Circuit Breaker
Amperage Rating:
20A
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Circuit Breakers

ABB THHQL1120PGFT – Frequently Asked Questions

1) Will the ABB THHQL1120PGFT breaker fit a panel that isn't plug-on neutral?
No. The THHQL1120PGFT is built as a plug-on neutral (PON) device, so it needs a load center with a plug-on neutral bar to land the neutral connection. If your panel uses a conventional neutral bar with a pigtail-style GFCI breaker, this one won't seat correctly and you need a pigtail version instead.
2) Is the ABB THHQL1120PGFT a GFCI breaker or an AFCI breaker?
It's a ground fault device. The THHQL1120PGFT provides ground-fault protection on the branch circuit to reduce shock and fire hazard. It is not an arc fault breaker, so if your inspector is calling for AFCI on bedroom or living-area circuits, this won't satisfy that requirement.
3) Does a 22kAIC rating matter for a residential panel, or is that overkill?
The 22kAIC interrupt rating on this ABB ground fault breaker is the short-circuit current it can clear safely. Most dwelling services never see available fault current near that, but commercial panelboards close to a large transformer often do, and the breaker's AIC must equal or exceed the available fault current at that panel. Speccing 22kAIC means the same breaker works on both the house and the higher fault-current commercial board, so MRO and property maintenance crews can carry one part.
4) I'm replacing a failed GFCI breaker in an existing panel. What do I need to match before ordering the THHQL1120PGFT?
Three things decide it: the panel has to accept THQL-style plug-in breakers, it has to have a plug-on neutral bar, and the circuit has to be a 20A single-pole load. Get those right and this is a straight swap. The ABB part number to order is THHQL1120PGFT, packaged one each, so it stocks well on the service truck.
5) Can a Square D Multi9 C60 miniature breaker be used in place of the ABB THHQL1120PGFT 20A ground fault breaker?
No. The ABB THHQL1120PGFT is a plug-on neutral (PON) breaker that seats directly onto the neutral bar of a compatible load center, and it provides ground fault protection at 20A with a 22kAIC interrupt rating. The Square D Multi9 C60 is a miniature circuit breaker in the Multi9 C60 series rated 120V AC, built on a different mounting and connection scheme, so it does not seat in a plug-on neutral load center the way the ABB breaker does. Treat them as breakers for two different kinds of enclosures rather than as interchangeable parts.
6) I need a 1-pole breaker for a DIN rail enclosure, not a load center - what should I look at instead of the ABB THHQL1120PGFT?
The ABB THHQL1120PGFT is a plug-on neutral breaker intended to install into compatible plug-on neutral panelboards and load centers, so it is not the part for a DIN rail enclosure. For DIN rail work, look at the Square D C60 UL489 miniature circuit breaker, which is a DIN rail mount MCB, or the Square D Multi9 C60 in the same family. Note that those are miniature circuit breakers rather than ground fault devices, so if the circuit requires ground fault protection you will need to confirm that function separately.
7) My panel is an I-Line panelboard - will the ABB THHQL1120PGFT fit it?
No. The ABB THHQL1120PGFT is built as a plug-on neutral breaker for compatible plug-on neutral load centers, which is a different connection system from an I-Line bus. For I-Line panelboards, the Square D PowerPacT Q is the I-Line style circuit breaker in that family. Confirm pole count and amperage against your panel schedule before ordering either one.
8) What size circuit does the ABB 1-pole ground fault breaker protect?
It's rated 20A on a single pole, which covers standard 20-amp branch circuits: kitchen and bath receptacles, garage and exterior outlets, laundry. Being 1-pole, it takes one space in the panel, so a row of them won't eat the board the way two-pole GFCI breakers do.
9) Can I use this ABB breaker on a DIN rail in a control panel?
No. The THHQL1120PGFT is a plug-in load center breaker, not a DIN rail device. For DIN rail mounting in an industrial control enclosure, look at the Square D C60 UL489 miniature circuit breaker, which is a DIN rail mount MCB, or the Square D Multi9 C60 1-pole C-curve breaker for 120V AC control circuits.
10) Can I standardize on the ABB THHQL1120PGFT across a multi-family property with mixed panel vintages?
Only where the panels take plug-on neutral breakers. Older load centers in an older building are usually conventional-neutral, and this breaker won't land in them. Where a property has been re-panelled or the newer buildings are PON, one 20A single-pole GF part number covers every 20A ground-fault circuit in those units, and the 22kAIC rating keeps it valid on the higher fault-current house panels too.
11) Is the Square D PowerPacT B a heavier-duty alternative to the ABB THHQL1120PGFT 20A breaker?
They serve different positions in a distribution system. The ABB THHQL1120PGFT is a 1-pole, 20A branch-circuit device with ground fault protection and plug-on neutral termination, sized for branch circuits in residential and light commercial panels. The Square D PowerPacT B is a thermal magnetic circuit breaker in the PowerPacT B series, a molded case style device used where a bolted or panelboard-mounted main or feeder breaker is called for. If your drawing calls for branch-circuit ground fault protection in a plug-on neutral load center, the PowerPacT B is not a substitute for it.
12) If I only need overcurrent protection at 20A and no ground fault function, do I still need the ABB THHQL1120PGFT?
Not necessarily. The ABB THHQL1120PGFT carries a ground fault function on top of its 20A overcurrent rating, which is what makes it the right choice where the circuit has to detect ground faults. Where the code requirement is straight overcurrent protection only, a standard miniature circuit breaker such as the Square D Multi9 C60 or the DIN rail mount Square D C60 UL489 MCB covers that role, provided the enclosure accepts DIN rail devices. Match the breaker to both the required protective function and the panel type you are feeding.
How fast can I get the ABB THHQL1120PGFT delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ABB THHQL1120PGFT come with a warranty?
Absolutely. The ABB THHQL1120PGFT is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ABB THHQL1120PGFT?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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