ABB Q-Line THQL11 DFCI Dual Fu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$75.26
ABB Q-Line THQL11 DFCI Dual Function AFCI/GFCI Circuit Breaker

ABB Q-Line THQL11 DFCI Dual Function AFCI/GFCI Circuit Breaker

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Model: THQL1120PDF
$75.26

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

$75.26
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ABB Q-Line THQL11 DFCI Dual Function AFCI/GFCI Circuit Breaker

The ABB Q-Line THQL11 DFCI is a dual function circuit breaker that combines AFCI (arc-fault circuit interrupter) and GFCI (ground-fault circuit interrupter) trip protection in a single 1-pole, plug-in unit, available in 15/20A configurations rated 120V with a 240V voltage rating and a 10KA interrupt rating. This Q-Line frame breaker is engineered as a direct plug-in replacement for compatible ABB Q-Line panelboards and load centers, delivering both arc-fault and ground-fault protection from a single breaker slot instead of two separate devices. This combined approach helps electricians and property owners satisfy dual AFCI/GFCI protection requirements common in bedrooms, laundry areas, and other habitable spaces without sacrificing panel capacity.

Key Features

  • Dual Function Protection: Combines LI AFCI and GFCI trip functions in a single DFCI breaker for comprehensive arc-fault and ground-fault circuit protection on one branch circuit.
  • Electrical Rating: 1-pole breaker rated 120V for branch circuit use, with a 240V voltage rating, 15/20A configurations, and a 10KA interrupt (short-circuit) rating.
  • Q-Line Frame: Plug-in application design engineered for direct installation in compatible ABB Q-Line panelboards and load centers.
  • Load Rating: HACR and SWD rated, making it suitable for heating, air conditioning, and refrigeration circuits as well as switching duty applications.
  • Connection: Accepts #14-8 AWG conductors, providing flexibility for a range of branch-circuit wiring configurations.
  • Trip Range: Non-interchangeable trip unit provides a consistent, factory-set protection point that cannot be field-altered.
  • Manufacturing Standard: Produced to Standard E471742 for consistent, repeatable quality.
  • Packaging: Supplied individually, 1 EA per package, for straightforward stocking and replacement ordering.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Residential and Commercial Branch Circuit Protection
  • Bedroom and Habitable Room Circuits Requiring AFCI Protection
  • Bathroom, Kitchen, Laundry, and Outdoor GFCI-Protected Circuits
  • Q-Line Panelboard and Load Center Installations
  • HACR and Switching Duty (SWD) Circuit Applications
  • New Construction, Panel Upgrades, and Breaker Replacements

Why ABB?

ABB Q-Line THQL11 DFCI breakers combine AFCI and GFCI protection into a single, panel-space-saving device manufactured to Standard E471742, helping installers meet dual arc-fault and ground-fault protection requirements without doubling the number of breakers used. With a 10KA interrupt rating, HACR/SWD load rating, and a non-interchangeable trip unit engineered for consistent, repeatable performance, this breaker is built to support code-compliant, reliable protection in professional electrical installations. Choosing genuine ABB Q-Line components helps ensure proper fit and function in compatible Q-Line panelboards and load centers.

Product Specs

Product Type:
Circuit Breaker
Series:
THQL11
Configuration:
1-Pole
Voltage Rating:
120V
Amperage Rating:
15/20A
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

ABB THQL1120PDF – Frequently Asked Questions

1) Will an ABB THQL11 DFCI breaker fit in my existing panel?
The THQL11 DFCI is a Q-Line frame plug-in breaker, so it installs directly in compatible ABB Q-Line panelboards and load centers. It is not a DIN rail device and it is not intended for other manufacturers' bus designs. Check that your panel is a Q-Line before ordering.
2) What is the difference between the THQL1120DF and the THQL1120PDF?
Connection type. The DF versions (THQL1115DF and THQL1120DF) use a pigtail neutral that lands on the panel neutral bar. The PDF versions (THQL1115PDF and THQL1120PDF) are plug-on neutral, picking the neutral up off the bus when the breaker snaps in. Your panel decides which one you need: a plug-on neutral breaker needs a panel with a plug-on neutral bus.
3) Does one ABB DFCI breaker satisfy both AFCI and GFCI requirements on the same circuit?
Yes. The Q-Line DFCI combines arc-fault and ground-fault trip functions in one 1-pole device, so a circuit needing both types of protection is covered from a single breaker slot rather than two separate devices. That is the reason to spec it over a standalone AFCI or GFCI breaker.
4) Can a Square D Multi9 C60 breaker be used in place of an ABB Q-Line THQL11 DFCI breaker?
No. The ABB Q-Line THQL11 DFCI is a plug-in breaker built to seat directly in compatible ABB Q-Line panelboards and load centers, and it carries combined AFCI and GFCI trip protection in a 1-pole, 120V body. The Square D Multi9 C60 is a 1-pole 120V AC miniature circuit breaker in the Multi9 C60 series, a thermal-magnetic C-curve device with no arc-fault or ground-fault sensing. Even setting the mounting difference aside, swapping to a C60 removes the dual-function protection entirely, so it will not satisfy a circuit that was specified for AFCI/GFCI.
5) I need a 120V single pole breaker for a DIN rail enclosure, not a load center. What should I look at instead of the ABB THQL11 DFCI?
The ABB Q-Line THQL11 DFCI is a plug-in breaker designed for direct installation in compatible ABB Q-Line panelboards and load centers, so it has no DIN rail provision. For a DIN rail enclosure, the Square D C60 UL489 miniature circuit breaker is DIN rail mount. Note that the C60 is a standard miniature circuit breaker, so if the circuit requires the combined arc-fault and ground-fault protection the THQL11 DFCI provides, that protection would have to be handled by another device in the DIN rail assembly.
6) What amperages does the ABB THQL11 DFCI breaker come in?
Two: 15 amp and 20 amp, each offered in pigtail (THQL1115DF, THQL1120DF) and plug-on neutral (THQL1115PDF, THQL1120PDF) versions. Fifteen amp typically serves bedroom and general lighting circuits, twenty amp the 12 AWG kitchen, bath, laundry and outdoor receptacle circuits.
7) Is the THQL11 DFCI 120V only, or can it be used at 240V?
It is a 1-pole breaker rated 120V for branch circuit use and carries a 240V voltage rating. Practically that means it protects a 120V circuit; for a 240V two-wire load you need a 2-pole device, not this one.
8) What is the difference between the ABB THQL11 DFCI and a Square D PowerPacT Q I-Line breaker?
The Square D PowerPacT Q is an I-Line series breaker, a bolt-in style device for I-Line panelboards. The ABB Q-Line THQL11 DFCI is a plug-in breaker engineered for compatible ABB Q-Line panelboards and load centers, in a 1-pole 120V configuration with combined AFCI and GFCI trip protection, HACR and SWD load rating, and a non-interchangeable trip unit. Despite the similar sounding names, Q-Line and I-Line are different mounting systems, so the two are not interchangeable in a panel.
9) Can the trip setting on this breaker be changed in the field?
No. The Q-Line DFCI uses a non-interchangeable trip unit, so the amp rating is factory set and fixed. If a circuit needs a different rating you replace the breaker with the correct amperage, which is why both 15A and 20A versions are stocked.
10) How many of these come in a box?
Supplied individually, 1 each per package, which suits both a single replacement for a nuisance-tripping circuit and ordering exact counts for a panel build.
How fast can I get the ABB THQL1120PDF 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 THQL1120PDF come with a warranty?
Absolutely. The ABB THQL1120PDF 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 THQL1120PDF?
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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