Leviton 1-Pole 20A Circuit Bre...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$20.54
Leviton 1-Pole 20A Circuit Breaker, 120V, 10KA

Leviton 1-Pole 20A Circuit Breaker, 120V, 10KA

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Model: LB120

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

$20.54
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Leviton 1-Pole 20A Circuit Breaker, 120V, 10KA

The Leviton is a Standard Branch Circuit Breaker engineered for dependable overcurrent protection in residential and commercial electrical panels. This 1-Pole breaker is rated for 20A at 120V and carries a 10KA interrupt rating, making it a solid choice for protecting individual branch circuits such as lighting, general-purpose receptacles, and other everyday electrical loads. Built to standard breaker dimensions, it installs easily into compatible panelboards and load centers for straightforward circuit protection upgrades, panel servicing, or breaker replacements where a Standard-type 1-Pole 20A 120V device is required. Electricians and facility maintenance teams can specify this Leviton breaker with confidence that its rated amperage, voltage, and interrupt rating match the demands of typical branch circuit wiring.

Key Features

  • Amperage Rating: 20A rating provides appropriately sized overcurrent protection for standard branch circuits carrying lighting and receptacle loads.
  • Voltage Rating: 120V rating suits common residential and light commercial circuit applications found in most branch circuit panels.
  • Single-Pole Design: 1-Pole configuration delivers a compact footprint that conserves valuable panelboard space, allowing more circuits per panel.
  • Interrupt Rating: 10KA interrupt rating ensures the breaker can safely clear fault currents without failure, supporting reliable protection under fault conditions.
  • Standard Branch Circuit Breaker: Purpose-built for branch circuit protection, offering reliable, repeatable performance for everyday electrical loads.
  • Panel Compatibility: Designed to install into compatible standard panelboards and load centers for simple servicing, retrofits, or upgrades.
  • Single-Pole Poles Rating: Poles rating of 1 confirms single-phase branch circuit application suitability.
  • Consistent Quality: Manufactured by Leviton to deliver dependable switching and trip performance across the rated 20A, 120V specification.

Technical Specifications

  • list_batch: LEV-PREEXIST-20260803
  • Poles: 1

Typical Applications

  • Residential and Commercial Electrical Panels
  • Branch Circuit Overcurrent Protection
  • Panelboard and Load Center Wiring
  • Lighting and General-Purpose Receptacle Circuits
  • Electrical Panel Renovation and Circuit Replacement Projects
  • Routine Panel Maintenance and Breaker Swaps

Why Leviton?

Leviton branch circuit breakers are built to deliver dependable, code-compliant overcurrent protection for the electrical loads professionals and homeowners rely on every day. With a defined 20A, 120V, 1-Pole rating and a 10KA interrupt rating, this breaker is engineered to perform reliably in standard panelboard installations, giving electrical contractors a straightforward, trustworthy option for branch circuit work. Choosing Leviton electrical products means choosing consistent quality, predictable fit, and dependable protection for branch circuit protection tasks across residential and commercial projects alike. Stock the Leviton for panel builds, service calls, and everyday circuit protection needs.

Manufacturer Resources

Product Specs

Poles:
1
Product Type:
Circuit Breaker
Department:
Electrical
Product Group:
Circuit Protection
Short Circuit Current:
10 kiloamps
Product Weight:
0.42 pounds
Warranty Length:
10 years
Operating Temperature:
-40 degrees celsius
Product Subgroup:
Circuit Breakers

Leviton LB120 – Frequently Asked Questions

1) Is the Leviton LB120 breaker available in anything other than 20A?
Two amperages are offered in this Leviton branch breaker: the LB120 at 20A and the LB130 at 30A. Both are single-pole devices, so a 30A single-pole slot is the swap if you are feeding a heavier dedicated load rather than a general lighting or receptacle circuit.
2) Will a 10kA interrupting rating be enough for my panel?
The Leviton LB120 carries a 10kA short circuit current rating, which covers the available fault current at most residential and light commercial branch panels fed from a typical utility transformer. Where the engineer's panel schedule calls for a 22kA or higher series or fully rated device, this breaker does not meet that and you need a higher AIC breaker instead.
3) Is the Leviton LB120 a GFCI or AFCI breaker?
No. The LB120 is a standard thermal branch circuit breaker providing overcurrent protection only. Circuits that code requires to be ground fault or arc fault protected, such as kitchen, bath, and bedroom receptacle circuits, need a GFCI or AFCI type breaker or protected receptacle instead.
4) What do I use instead of the Leviton LB120 for a three-phase feeder?
Step up to a 3-pole molded case breaker. The ABB A2N Series 3-pole molded case circuit breaker is UL listed, the ABB E150 Series is a 3-pole thermal magnetic breaker, and the ABB XT4 Series ships as a 3-pole molded case breaker kit. Square D offers the PowerPacT B thermal magnetic breaker and the PowerPacT Q I-Line breaker. The Leviton LB120 has a poles rating of 1, so it covers single-phase branch circuits only.
5) What is the closest single-pole 120V alternative to the Leviton LB120 breaker?
The nearest single-pole alternative is the Square D Multi9 C60, a 1-pole C-curve miniature circuit breaker rated 120V AC. The Leviton LB120 is a standard branch circuit breaker with 1 pole and a 10 kiloamp short circuit current rating that drops into compatible panelboards and load centers, while the Multi9 C60 is a miniature circuit breaker built around a C tripping curve. Both cover single-phase branch circuit work at 120V; the C60 is the one to look at when a C-curve trip characteristic is called out.
6) I need a breaker on a DIN rail, not in a panelboard - what should I order instead of the Leviton LB120?
Order the Square D C60 UL489 miniature circuit breaker, which is a DIN rail mount device. The Leviton LB120 is a standard branch circuit breaker sized to install into compatible panelboards and load centers, so it is not the part for a DIN rail in a control enclosure. The ABB ST200M miniature circuit breaker is another miniature option, listed to UL1077 rather than UL489.
7) Can I use the ABB ST200M in place of the Leviton LB120 for a branch circuit?
They are listed to different standards. The ABB ST200M is a miniature circuit breaker to UL1077, which is a supplementary protector classification, while the Leviton LB120 is a standard branch circuit breaker intended for overcurrent protection of branch circuits such as lighting and general-purpose receptacles. If branch circuit protection is what the drawing calls for, the Square D C60 is the UL489 miniature circuit breaker in this group.
8) How much panel space does a single-pole Leviton 20A breaker take up?
One pole, so one space in the load center. That is the practical difference on a full panel: a single-pole 20A device handles a 120V branch circuit like lighting or general receptacles, while a 240V load (water heater, dryer, compressor) needs a two-pole breaker occupying two spaces.
9) Can I install this Leviton breaker in an unheated garage or outdoor panel?
Operating temperature is rated down to -40 degrees Celsius, so cold storage buildings, unheated garages, and exterior panel locations are within the device's temperature range. The enclosure rating, not the breaker, governs whether the panel itself is suitable outdoors.
10) How is this Leviton plug-in breaker different from a DIN rail miniature circuit breaker?
The Leviton LB120 is a standard branch circuit breaker built to drop into a compatible panelboard or load center. A DIN rail device such as the Square D C60 UL489 miniature circuit breaker mounts on rail inside control panels and equipment enclosures instead. If you are protecting house or building branch circuits, you want the panel-mount breaker; for machine control or equipment panels, the DIN rail type is the right family.
11) Is the Square D PowerPacT B a substitute for the Leviton LB120?
No. The Square D PowerPacT B is a thermal magnetic molded case breaker, a frame-style device for feeder and main duty, and the PowerPacT Q is an I-Line breaker that mounts to an I-Line bus. The Leviton LB120 is a 1-pole standard branch circuit breaker that installs into compatible panelboards and load centers for individual branch circuits. For a like-for-like single-pole 120V branch device, the Square D Multi9 C60 is the closer match.
How fast can I get the Leviton LB120 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 LB120 come with a warranty?
Absolutely. The Leviton LB120 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 LB120?
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 LB120 from ZenSupply?
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