ABB Q-Line THQL 2-Pole Thermal...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$23.43
ABB Q-Line THQL 2-Pole Thermal Magnetic Circuit Breaker

ABB Q-Line THQL 2-Pole Thermal Magnetic Circuit Breaker

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Model: THQL2140

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

$23.43
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ABB Q-Line THQL 2-Pole Thermal Magnetic Circuit Breaker

The ABB Q-Line THQL 2-Pole Thermal Magnetic Circuit Breaker is a plug-in (Q-Line) breaker built for 120/240V residential and light commercial panelboards. This family is available across a range of amperage options from 15 amperes up to 125 amperes, allowing electrical professionals to match the exact branch circuit load requirement while standardizing on a single, code-compliant Q-Line platform. Each breaker in the series uses an LI (thermal magnetic) trip type on a non-interchangeable trip range, combining thermal and magnetic tripping to deliver dependable overcurrent and short-circuit protection for load center circuits.

Key Features

  • 2-Pole Configuration: Designed for 120/240V circuits requiring double-pole protection.
  • Amperage Range: Available in ratings from 15 amperes through 125 amperes to suit a wide variety of branch circuit loads.
  • 10K IC Interrupting Capacity: Provides reliable fault-current interruption for panel protection across the series.
  • Thermal Magnetic Application: LI trip type combines thermal and magnetic tripping for standard overcurrent and short-circuit protection.
  • Q-Line Plug-In Frame: Q-Line (Plug-In) design for straightforward installation into compatible Q-Line load centers and panelboards.
  • Non-Interchangeable Trip Range: Fixed trip range for consistent, code-compliant circuit protection.
  • 120/240V Compatibility: Engineered for standard residential and light commercial voltage systems.

Technical Specifications

  • Amperage Rating: 100A (representative option; full series spans 15A-125A)
  • Sub Brand: Q Line
  • Frame: Q-Line
  • Trip Type: LI
  • Brand Name: Q-Line (Plug-In)
  • Trip Range: Non-Interchangeable
  • Application: Thermal Magnetic
  • Packaging: 1 EA
  • PDF Spec Sheet: Available from manufacturer documentation

Typical Applications

  • Residential Load Center Wiring
  • Panelboard Circuit Protection
  • Light Commercial Electrical Installations
  • Branch Circuit Overcurrent Protection
  • Renovation and New Construction Panel Upgrades

Why ABB?

ABB's Q-Line THQL series delivers thermal magnetic circuit breakers engineered for consistent, code-compliant overcurrent protection across a broad amperage range. With a defined 10K interrupting capacity and non-interchangeable trip range shared across the series, this breaker family offers electrical professionals a dependable, plug-in solution for Q-Line compatible panelboards in both residential and light commercial settings.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Circuit Breaker
Amperage Rating:
15A - 125A
Voltage Rating:
120/240V
Series:
Q-Line THQL
Configuration:
2-Pole
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Circuit Breakers

ABB THQL2140 – Frequently Asked Questions

1) Is the ABB THQL 100 amp breaker rated for 120/240V single phase?
Yes. The 2-pole THQL is rated 120/240V, which covers a standard residential or light commercial single phase service. The 2-pole configuration gives you both legs for a 240V load such as a range, dryer, sub-panel feed, or AC condenser.
2) What is the interrupting rating on the ABB Q-Line THQL breaker?
10,000 AIC (10K IC). That is the standard interrupting capacity for residential and light commercial load centers. If your available fault current at the panel exceeds 10kA, this breaker is not the right choice and you need a higher AIC device.
3) What should I use instead of an ABB THQL breaker if the panel is a DIN rail enclosure rather than a plug-in load center?
The ABB Q-Line THQL is a plug-in frame breaker made to drop into Q-Line load centers and panelboards, so it will not land on a DIN rail. For a DIN rail enclosure, the Square D C60 UL489 miniature circuit breaker is a DIN rail mount device and is the right family to look at. The THQL stays with the plug-in panel; the C60 goes on the rail.
4) What is the closest thermal magnetic alternative to the ABB THQL if I need a molded case breaker instead of a plug-in?
The ABB Q-Line THQL uses a thermal magnetic LI trip on a non-interchangeable trip range in a Q-Line plug-in frame. If the job calls for a molded case unit, the Square D PowerPacT B is also a thermal magnetic circuit breaker. Both trip thermally and magnetically; the difference is the frame and how it mounts, so confirm the enclosure accepts a PowerPacT B before substituting.
5) What amperages does the ABB THQL breaker come in?
Orderable ratings run 15, 20, 25, 35, 40, 100, and 125 amperes, plus accessory items including a THQLLX1 shunt trip accessory and a THQLSURGE2 surge device. The 100A version is THQL21100 and the 125A is THQL21125.
6) Can the trip setting on a THQL breaker be adjusted or changed?
No. The THQL uses a non-interchangeable, fixed trip range with an LI thermal magnetic trip curve. You size the breaker by ordering the correct amperage, not by adjusting it in the field. If your job needs an adjustable or interchangeable trip unit, look at a molded case breaker such as the Square D PowerPacT B thermal magnetic.
7) What does a thermal magnetic (LI) breaker protect against?
Two things. The thermal element handles sustained overloads, tripping on heat build-up over time, and the magnetic element trips instantly on a short circuit or high fault current. That combination is what a branch circuit or feeder needs for standard overcurrent protection. The THQL does not provide ground fault or arc fault protection.
8) Can I use a 100 amp THQL breaker to feed a sub-panel?
A 2-pole 100A THQL at 120/240V is sized for higher-load branch circuits and load center feeds in residential and light commercial panels. The host panel has to be Q-Line compatible and its bus has to be rated for the breaker, and the feeder conductors sized to the 100A rating per code.
9) What is the difference between the ABB THQL and a Square D I-Line breaker?
Different panel systems entirely. The THQL is a Q-Line plug-in breaker for residential and light commercial load centers at 120/240V. The Square D PowerPacT Q I-Line is an I-Line style molded case breaker for I-Line panelboards. They are not interchangeable, and the panel you are working in decides which one you buy.
10) Is the Square D Multi9 C60 1-pole a substitute for a THQL 2-pole 100 amp breaker?
No. The Square D Multi9 C60 is a 1-pole C-curve miniature circuit breaker rated 120V AC, while the ABB THQL covered here is a 2-pole device rated 120/240V at 100 amps. Different pole count, different voltage rating, and the Multi9 is a miniature breaker rather than a Q-Line plug-in. They serve different circuits.
11) I need a branch breaker for a residential load center. Is the Square D C60 or the ABB THQL the right choice?
For a standard residential or light commercial load center, the ABB Q-Line THQL is the plug-in breaker intended for that use, with a 120/240V rating and thermal magnetic protection. The Square D C60 is a UL489 miniature circuit breaker that mounts to DIN rail, which is typical of control panels and equipment enclosures rather than a household load center bus.
12) Do ABB THQL breakers ship individually or in multi-packs?
Packaging is 1 EA, so each order unit is a single breaker. For standardizing a building or stocking a maintenance cart, order the count you need per amperage.
How fast can I get the ABB THQL2140 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 THQL2140 come with a warranty?
Absolutely. The ABB THQL2140 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 THQL2140?
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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