ABB THQC Q-Line Lug-Lug Therma...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$508.45
ABB THQC Q-Line Lug-Lug Thermal-Magnetic Circuit Breaker, 120/240V

ABB THQC Q-Line Lug-Lug Thermal-Magnetic Circuit Breaker, 120/240V

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Model: THQC21100WL
$508.45

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

$508.45
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ABB THQC Q-Line Lug-Lug Thermal-Magnetic Circuit Breaker, 120/240V

The ABB THQC Q-Line Lug-Lug Circuit Breaker is a compact, one-inch-wide-per-pole thermal-magnetic device engineered for residential and commercial electrical panels. Rated 120/240 Vac with a 15 A trip rating, this QC-style breaker is the lug-lug version of the Q Line family, supporting 35mm DIN rail mounting and terminal connections sized for 14-8 kcmil / 12-8 kcmil conductors. Built and tested to Standard E11592, it delivers dependable thermal-magnetic overcurrent protection for load centers and panelboards.

Key Features

  • Compact One-Inch Design: Each pole measures one inch wide, allowing dense breaker arrangements within standard load centers and panelboards.
  • Lug-Lug Connection: QC breakers are the lug-lug version of the Q Line, accepting 14-8 kcmil / 12-8 kcmil conductors and supporting 35mm DIN rail mounting.
  • Thermal-Magnetic Trip: Trip Type LI (thermal-magnetic) provides reliable overcurrent and short-circuit protection.
  • Amperage Rating: Rated 15 A for accurately sized circuit protection.
  • Voltage Rating: Rated 120/240 Vac for standard residential and commercial branch circuits.
  • Quick-Make / Quick-Break Mechanism: Ensures fast, positive switching action for improved safety and reliability.
  • Common Trip Bar & Trip Indication: Multi-pole versions share a common trip bar, and easy-to-spot trip indication simplifies troubleshooting.
  • Non-Interchangeable Trip Range: Fixed trip range for consistent, tamper-resistant overcurrent protection.

Certifications & Compliance

  • Listed to Standard E11592
  • Buy American Act (BAA) Compliance: Contact Manufacturer
  • American Recovery and Reinvestment Act (ARRA) Compliance: Contact Manufacturer

Technical Specifications

  • Sub Brand: Q Line
  • Frame: Q-Line
  • Brand Name: Q-Line (Lug-Lug)
  • Voltage Rating: 120/240 Vac
  • Trip Type: LI
  • Trip Range: Non-Interchangeable
  • Connection: 14-8 kcmil / 12-8 kcmil
  • Standard: E11592
  • Packaging: 1 EA

Typical Applications

  • Residential Load Centers and Panelboards
  • Commercial Electrical Distribution Panels
  • DIN Rail-Mounted Circuit Protection
  • Branch Circuit Overcurrent Protection
  • Panel Retrofits and New Construction Wiring

Why ABB?

ABB's Q Line circuit breakers combine a compact, one-inch-per-pole footprint with quick-make/quick-break switching, common trip bars, and clear trip indication to keep electrical panels safe and easy to service. With thermal-magnetic protection built and tested to Standard E11592, the lug-lug THQC breaker gives electricians a dependable, code-oriented option for 120/240 Vac residential and commercial circuits.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Circuit Breaker
Series:
Q Line
Voltage Rating:
120/240V
Amperage Rating:
15A
Connection Type:
Lug-Lug
Standards:
E11592
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Circuit Breakers

ABB THQC21100WL – Frequently Asked Questions

1) What amperages and pole configurations does the ABB THQC Q-Line breaker come in?
The THQC Q-Line lug-lug breakers run from 15A to 100A across one, two, and three pole builds. Single pole covers 15A (THQC1115WL) and 20A (THQC1120). Two pole covers 15A (THQC2115), 20A (THQC2120WL), 30A (THQC2130), 40A (THQC2140), 50A (THQC2150WL) and 100A (THQC21100WL). Three pole covers 60A (THQC32060WL), 70A (THQC32070WL) and 100A (THQC32100WL). Order by the exact catalog number, since the amperage and pole count are baked into it.
2) What is the difference between a THQC lug-lug breaker and a standard plug-on Q-Line breaker?
QC is the lug-lug version of the Q Line family. Instead of plugging onto a panel bus, both ends terminate on lugs, and the breaker mounts to 35mm DIN rail. That makes it the right pick when you are feeding a breaker from cable on both the line and load side, in a DIN rail enclosure or a custom assembly, rather than dropping it into a load center bus stab.
3) What wire size will the THQC breaker lugs accept?
Terminals on the THQC are sized for 14-8 kcmil / 12-8 kcmil conductors. Check your conductor size against that range before you order, because the lug is what limits you here, not the trip rating.
4) Can I use the THQC breaker on a 240V circuit, or is it 120V only?
Rated 120/240 Vac, so it covers both standard 120V branch circuits and 240V two-pole loads like ranges, dryers, water heaters and small HVAC equipment on a residential or light commercial panel.
5) What is the difference between the ABB THQC Q-Line breaker and the Square D Multi9 C60 miniature circuit breaker?
They are built for different panel systems. The ABB THQC is a Q-Line thermal-magnetic breaker rated 120/240 Vac, one inch wide per pole, with lug-lug terminations sized for 14-8 kcmil / 12-8 kcmil conductors, and it is sold in 1-, 2- and 3-pole versions from 15A through 100A. The Square D Multi9 C60 is a 1-pole C-curve miniature circuit breaker rated 120V AC. If you are protecting a branch circuit in a residential or commercial load center on a 120/240 V system, the THQC is the form factor to order; the C60 is the choice where a C-curve MCB on a 120 V control or DIN-rail application is specified.
6) I need a DIN rail mounted breaker that is UL 489 listed - is the THQC the right part or should I look at the Square D C60?
Both mount on DIN rail. The ABB THQC Q-Line lug-lug breaker supports 35mm DIN rail mounting and is built and tested to Standard E11592, with thermal-magnetic (trip type LI) protection at 120/240 Vac. The Square D C60 is a UL489 miniature circuit breaker specifically offered as a DIN rail mount device. If your drawing calls out UL 489 by name for the DIN rail device, the C60 is the part written to that callout; if you want a 120/240 Vac lug-lug breaker that also drops on 35mm rail, the THQC covers it.
7) My panel is an I-Line panelboard - will an ABB THQC breaker fit it?
No. The ABB THQC Q-Line is a lug-lug breaker for load centers and panelboards that take the Q-Line one-inch-per-pole format, with 35mm DIN rail support and lug terminations for 14-8 kcmil / 12-8 kcmil conductors. I-Line panelboards use a bolt-in I-Line connection, and the Square D PowerPacT Q is the I-Line circuit breaker for that interior. The name similarity between ABB Q-Line and Square D PowerPacT Q is not an indication of interchangeability - match the breaker to the panel interior.
8) How much panel space does each pole of an ABB Q-Line breaker take up?
One inch per pole. A single pole eats one inch of space, a two pole takes two inches, a three pole takes three. That one-inch-per-pole footprint is what lets you pack a load center or panelboard densely without going to a wider frame.
9) Does a two-pole or three-pole THQC breaker trip both legs together?
Yes. Multi-pole THQC breakers use a common trip bar, so an overload or fault on any one pole opens all poles at once. That is what you need for a true 240V or three-phase load, and it is why you use a multi-pole unit rather than tying handles on singles.
10) What kind of trip mechanism does the THQC use, and can the trip rating be changed?
It is a thermal-magnetic device, trip type LI: the thermal element handles sustained overloads and the magnetic element handles short circuits. The trip range is non-interchangeable, meaning the rating is fixed at the factory and cannot be swapped or adjusted in the field. If you need a different amperage, you order a different catalog number.
11) How do I tell at a glance which THQC breaker tripped in a panel?
The Q Line breakers carry trip indication on the handle, so a tripped pole is visible without metering the circuit. Combined with quick-make/quick-break switching, it keeps troubleshooting in a full panel down to a visual scan.
12) What standard is the ABB THQC breaker built and tested to?
The THQC is listed to Standard E11592. For Buy American Act or ARRA compliance on a government or institutional job, that determination comes from the manufacturer rather than being published on the product.
13) Do THQC breakers ship individually or in a multipack?
Packaging is 1 EA, so each catalog number is a single breaker. If you are standardizing a building's panels on Q Line, count your poles and order per unit.
How fast can I get the ABB THQC21100WL 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 THQC21100WL come with a warranty?
Absolutely. The ABB THQC21100WL 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 THQC21100WL?
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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