Leviton 2-Pole Main Circuit Br...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$115.83
Leviton 2-Pole Main Circuit Breaker, 120/240 VAC, 22kA Interrupt Rating

Leviton 2-Pole Main Circuit Breaker, 120/240 VAC, 22kA Interrupt Rating

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Model: LM100

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

$115.83
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Leviton 2-Pole Main Circuit Breaker, 120/240 VAC, 22kA Interrupt Rating

The Leviton 2-Pole Main Circuit Breaker, 120/240 VAC, 22kA Interrupt Rating delivers dependable overcurrent protection for residential and light commercial panelboards. Engineered as a 2-pole main breaker, this Leviton unit is available in 100 A, 125 A, 200 A, and 225 A amperage ratings to match a range of panel configurations, and it carries a 22kA interrupt rating for safe, reliable fault clearing on 120/240 VAC electrical systems. Whether used in a new panelboard installation or as a replacement main breaker, this Leviton device is built to serve as the primary overcurrent protection and disconnect point for the electrical service.

Key Features

  • 2-Pole Configuration: Designed as a main breaker with 2 poles for single-phase 120/240 VAC panelboard applications.
  • Amperage Options: Available in 100 A, 125 A, 200 A, and 225 A ratings, allowing the correct breaker to be matched to the panel's load requirements.
  • Voltage Rating: Rated for 120/240 VAC electrical distribution systems, common in residential and light commercial panelboards.
  • 22kA Interrupt Rating: Provides a 22,000-ampere interrupting capacity, giving the breaker the capability to safely clear high fault currents.
  • Main Breaker Function: Functions as the primary service disconnect and overcurrent protection device ahead of branch circuit breakers in the panelboard.
  • 2-Pole Design: Poles: 2, suited for two-pole panelboard main breaker positions.

Technical Specifications

  • list_batch: LEV-20260731
  • Product Type: (core)
  • Amperage: 225A
  • Poles: 2

Typical Applications

  • Residential and Light Commercial Panelboards
  • Main Service Disconnect Applications
  • Electrical Panel Upgrades and Replacements
  • New Construction Electrical Distribution Systems
  • Renovation and Retrofit Panelboard Projects

Why Leviton?

Leviton main circuit breakers are engineered to deliver dependable overcurrent protection with a 22kA interrupt rating suited for demanding panelboard environments. With multiple amperage options, 100 A, 125 A, 200 A, and 225 A, available in a single 2-pole, 120/240 VAC configuration, this Leviton main breaker gives electrical professionals a flexible solution for panelboard installations, upgrades, and service replacements where reliable, code-compliant overcurrent protection is required.

Manufacturer Resources

Product Specs

Product Type:
Circuit Breaker
Poles:
2
Department:
Electrical
Product Group:
Circuit Protection
Short Circuit Current:
22 kiloamps
Product Weight:
2.83 pounds
Warranty Length:
10 years
Product Subgroup:
Circuit Breakers
Voltage Rating:
120/240V

Leviton LM100 – Frequently Asked Questions

1) What amperage ratings does the Leviton LM Series 2-pole main circuit breaker come in?
Four ratings: 100 A (LM100), 125 A (LM125), 200 A (LM200) and 225 A (LM225). All four are 2-pole, 120/240 VAC main breakers with the same 22 kA interrupting rating, so the amperage is the only thing you pick between. Match it to the panelboard's service size, not to the sum of the branch breakers.
2) Is 22kA enough interrupting rating for my service, or do I need a higher AIC breaker?
The Leviton LM main breaker is rated 22 kA, meaning it can clear a bolted fault of up to 22,000 amps at 120/240 VAC. That covers typical residential and light commercial services fed from a utility transformer at normal distances. If your utility or engineer has calculated available fault current above 22,000 A at the panel (common on large transformers with short, heavy service conductors), this breaker is not rated for that location and you need a higher AIC device.
3) Can I use this Leviton 2-pole breaker for 208V or three-phase panels?
No. This is a 2-pole breaker rated 120/240 VAC for single-phase panelboards. A three-phase service needs a 3-pole main. For three-phase work look at a molded case device such as the ABB A2N Series 3-pole or the ABB E150 Series 3-pole thermal magnetic breaker.
4) Will a Leviton LM main breaker fit into a Square D or Eaton load center?
Treat it as Leviton-only. The LM100, LM125, LM200 and LM225 are main breakers built for Leviton panelboards, and main breaker interfaces are manufacturer specific. If you are replacing the main in another maker's panel, order that maker's main breaker. For a Square D panel the PowerPacT B thermal magnetic and PowerPacT Q I-Line breakers are the Square D molded case options.
5) I need a main breaker for a single-phase 120/240V panel - is the ABB A2N A2A150TT a substitute for the Leviton LM200?
No. The Leviton LM200 is a 2-pole main circuit breaker rated 120/240 VAC, built to sit ahead of the branch breakers as the service disconnect in a single-phase residential or light commercial panelboard. The ABB A2A150TT is a 3-pole molded case breaker in ABB's A2 Series, so its pole count is aimed at three-phase distribution rather than a two-pole main position. For a single-phase 120/240 V panel main, stay with the 2-pole Leviton LM series, which covers 100 A, 125 A, 200 A and 225 A.
6) Is the ABB ST200M a smaller-format option I can use in place of a Leviton LM125?
They are built to different standards and different jobs. The ABB ST is an ST200M miniature circuit breaker built to UL1077, which is the standard for supplementary protectors rather than branch or main overcurrent protection. The Leviton LM125 is a 125 A 2-pole main breaker for 120/240 VAC panelboards serving as the primary overcurrent protection and disconnect for the service. A UL1077 supplementary protector is not a replacement for a panelboard main.
7) Is this a main breaker or can I use it as a branch breaker in the panel?
It is a main. The LM Series sits ahead of the branch breakers as the primary overcurrent protection and service disconnect for the panelboard. It is not a plug-in branch device. For branch and DIN rail protection you would be looking at something like the Square D Multi9 C60 1-pole or the C60 UL489 DIN rail miniature breaker instead.
8) Does the 225A version have a different interrupting rating than the 100A?
No, all four amperages share the 22 kA short circuit rating at 120/240 VAC. Stepping up from the LM100 to the LM225 buys you more continuous current capacity, not more fault clearing capacity.
9) What is the difference between the Leviton LM series main breaker and a Square D PowerPacT B thermal magnetic breaker?
The Leviton LM series is a 2-pole main circuit breaker at 120/240 VAC, offered in 100 A, 125 A, 200 A and 225 A, with a 22 kA interrupting rating, and it is specified as the service disconnect and primary overcurrent device in residential and light commercial panelboards. The Square D SQU-BDA is a PowerPacT B series thermal magnetic molded case breaker - a molded case frame family typically applied as a feeder or main in equipment where a molded case device is called out on the drawing. Match whichever one the panelboard's main position is prepped to accept.
10) Which Leviton LM amperage should I standardize on across a multi-family property, and how does it compare to going with molded case breakers?
The Leviton LM main breaker comes in 100 A, 125 A, 200 A and 225 A, all 2-pole at 120/240 VAC with a 22 kA interrupting rating, so a portfolio of single-phase dwelling panels can be standardized on one or two of those ratings sized to each unit's service. The molded case alternatives in the same class - the Square D PowerPacT B thermal magnetic breaker and the ABB E150 series 3-pole thermal magnetic breaker - are separate frame families, and the ABB E150 is three-pole. Sizing must follow the service and panelboard listing for each building.
11) How heavy is the Leviton LM main breaker, and is it a one-person install?
It weighs 2.83 pounds, so handling is not the issue. Plan the work around the service disconnect instead: the line side of a main breaker stays energized with the breaker off, so the utility drop or meter has to be pulled before you touch it.
12) Where is the Leviton LM circuit breaker made? I need country of origin for a government job.
Country of origin is Mexico on the Leviton LM Series 2-pole main breakers.
How fast can I get the Leviton LM100 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 Leviton LM100 come with a warranty?
Absolutely. The Leviton LM100 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 Leviton LM100?
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
Why buy the Leviton LM100 from ZenSupply?
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