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Leviton Plug-On Mount AFCI Thermal Magnetic Branch Circuit Breaker
Model: LEV-LB
Leviton Plug-On Mount AFCI Thermal Magnetic Branch Circuit BreakerThe Leviton Plug-On Mount AFCI Thermal Magnetic Branch Circuit Breaker is engineered to deliver dependable arc-fault and overcurrent...
Leviton
Starting at
$22.16
Leviton Plug-On Mount AFCI/GFCI Thermal Magnetic Circuit Breaker, 1-Pole
The Leviton Plug-On Mount AFCI/GFCI Thermal Magnetic Circuit Breaker is a combination arc-fault and ground-fault branch circuit breaker built for dual-function safety in a single device. Its plug-on mounting design allows for direct installation into compatible load centers and panelboards without additional wiring adapters, and the thermal magnetic trip mechanism provides dependable overcurrent protection. Configured as a 1-Pole breaker, it is engineered to deliver combined AFCI and GFCI protection at the branch circuit level, helping reduce the risk of fire and shock hazards in residential and light commercial electrical systems. As part of the Leviton branch circuit breaker lineup, it is intended for professionals and electrical contractors seeking dependable, code-focused circuit protection.
Key Features
- Plug-On Mount Design: Installs directly onto compatible panelboard and load center bus bars for straightforward, adapter-free replacement or new installation.
- AFCI Protection: Combination arc-fault circuit interruption helps detect and interrupt dangerous arcing conditions before they can ignite a fire.
- GFCI Protection: Integrated ground-fault circuit interruption helps guard against shock hazards caused by current leakage to ground.
- Thermal Magnetic Trip Mechanism: Combines thermal and magnetic trip elements for dependable response to both sustained overloads and short-circuit conditions.
- 1-Pole Configuration: Sized for single-pole branch circuit applications, supporting straightforward circuit-level protection in standard load centers.
- Branch Circuit Breaker Function: Designed to serve as the primary overcurrent and fault protection device for an individual branch circuit within an electrical panel.
Technical Specifications
- list_batch: LEV-20260730
- Refer to manufacturer documentation for complete technical specifications, including amperage rating, voltage rating, and interrupt rating.
Typical Applications
- Residential Load Center and Panelboard Circuit Protection
- Branch Circuit Wiring for Individual Rooms or Loads
- Combination Arc-Fault and Ground-Fault Code-Required Circuits
- Electrical Panel Upgrades and Breaker Replacements
- New Construction and Remodel Electrical Installations
Why Leviton?
Leviton is a recognized name in electrical wiring devices and circuit protection, and this Plug-On Mount AFCI/GFCI Thermal Magnetic Circuit Breaker reflects that focus on dependable, code-conscious design. By combining arc-fault detection, ground-fault detection, and a thermal magnetic trip mechanism in a single 1-Pole, plug-on device, it offers electrical professionals a streamlined way to help meet dual-protection requirements on individual branch circuits. Choosing Leviton for branch circuit breaker needs supports consistent performance across a panelboard when paired with other Leviton electrical products.
Manufacturer Resources
Technical Information
Product Specs
- Product Type:
- GFCI/AFCI Circuit Breaker
- Connection Type:
- Plug-On Mount
- Amperage Rating:
- 20A
- Voltage Rating:
- 120V
- Poles:
- 1
- Device Type:
- AFCI
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Circuit Breakers
Leviton LB120-DFT – Frequently Asked Questions
1) What amperage and voltage is the Leviton LB120-DFT breaker rated for?
The Leviton LB120-DFT is a 20A, 120V single-pole breaker. That covers the standard 20-amp branch circuits feeding kitchen counter receptacles, laundry, bedrooms and general lighting and receptacle loads. If the circuit you are protecting is 15A or a 240V two-pole load, this is not the right part.
2) Does the LB120-DFT give both arc-fault and ground-fault protection, or do I still need a GFCI receptacle downstream?
It does both. The LB120-DFT is a dual-function breaker: combination AFCI arc-fault detection plus GFCI ground-fault protection in one device, so the branch circuit is covered from the panel without adding a GFCI receptacle at the first outlet. It also carries a thermal magnetic trip for sustained overloads and short circuits.
3) Will a plug-on breaker like this fit my panel, or do I need a bolt-on?
Plug-on mount. The LB120-DFT snaps directly onto the bus bar of a compatible load center or panelboard, with no adapter or mounting hardware needed. Panelboards prepped for bolt-on breakers will not take it, so confirm your panel is a plug-on bus and accepts Leviton load center breakers before ordering.
4) Is the Square D Multi9 C60 1-pole breaker a substitute for the Leviton LB120-DFT?
No. The Leviton LB120-DFT is a 1-pole, 20A, 120V plug-on mount breaker with combination AFCI and GFCI protection, so it seats directly on the bus of a compatible load center and provides both arc-fault and ground-fault detection on the branch circuit. The Square D Multi9 C60 is a 1-pole C-curve miniature circuit breaker rated 120V AC, a supplementary-style MCB that provides overcurrent protection only and mounts in a DIN rail enclosure rather than on a load center bus. If the circuit is being protected to satisfy a dual-function AFCI/GFCI requirement, the C60 does not perform that role.
5) The ABB ST200M is also a miniature breaker - can it protect the same branch circuit as the Leviton LB120-DFT?
They are built to different standards of use. The ABB ST200M is a miniature circuit breaker to UL1077, which is a supplementary protection standard, so it is intended to protect equipment downstream of a branch circuit device rather than to serve as the branch circuit breaker itself. The Leviton LB120-DFT is a 1-pole 20A 120V branch circuit breaker with thermal magnetic trip plus combination AFCI and GFCI protection, installed as the primary overcurrent and fault device for the circuit in a load center.
6) Can I use the LB120-DFT to replace a standard 20A breaker during a panel upgrade?
That is one of its intended uses. It is a direct plug-on replacement for a 20A single-pole branch breaker in a compatible Leviton load center, and it adds AFCI and GFCI protection the old breaker did not have. Note that a dual-function breaker needs the circuit's neutral landed on the breaker rather than the neutral bar, so the branch neutral has to be separable from any shared or bootlegged connection.
7) I need a single-pole 120V breaker but not the AFCI/GFCI function. What else is there?
For a plain single-pole 120V AC device, the Square D Multi9 C60 1-Pole C-Curve miniature circuit breaker covers that duty without the dual-fault electronics. Choose the Leviton LB120-DFT only where the circuit actually requires combination arc-fault and ground-fault protection, since that is the whole point of the device.
8) What exact part number do I order for the Leviton 20A dual-function breaker?
Order Leviton LB120-DFT. That is the single model on the Leviton plug-on AFCI/GFCI thermal magnetic line described here: 20A, 120V, 1-pole. Leviton also publishes technical information for it at zensupply.com/content/pdf/leviton/technical-information-edc143.pdf if your spec review needs the full ratings sheet.
9) For a feeder or main disconnect instead of a 20A branch circuit, what takes the place of the Leviton LB120-DFT?
The Leviton LB120-DFT is a 1-pole 20A 120V branch circuit breaker, sized for an individual branch circuit rather than a feeder. For larger distribution duty, molded case breakers cover that range: the Square D PowerPacT B is a thermal magnetic molded case breaker, the Square D PowerPacT Q is an I-Line circuit breaker, the ABB A2N Series is a 3-pole UL Listed molded case breaker, and the ABB E150 Series is a 3-pole thermal magnetic breaker. All are multi-pole or frame-mounted devices rather than plug-on branch breakers.
10) I need three-phase protection, not a single-pole - what are the alternatives to the Leviton LB120-DFT?
The Leviton LB120-DFT is a 1-pole device rated 120V, so it covers one ungrounded conductor only. For three-pole duty, the ABB E150 Series is a 3-pole thermal magnetic circuit breaker, the ABB A2N Series is a 3-pole UL Listed molded case breaker, and the ABB XT4 Series is offered as a 3-pole molded case circuit breaker kit. These are overcurrent devices and do not include the arc-fault and ground-fault functions built into the Leviton.
11) Both the Leviton LB120-DFT and the Square D PowerPacT B are thermal magnetic - what is the actual difference?
Both use a thermal magnetic trip mechanism, but they sit at different points in the system. The Leviton LB120-DFT is a plug-on mount 1-pole branch breaker rated 20A at 120V that adds combination AFCI and GFCI detection to that trip mechanism. The Square D PowerPacT B is a molded case thermal magnetic circuit breaker, a frame-style device used for distribution and equipment protection rather than plugging onto a residential load center bus.
12) Where does the LB120-DFT actually get used on a job?
Residential and light commercial branch circuits: bedroom and living area receptacles, kitchen and laundry circuits, and any circuit the inspector is calling for both arc-fault and ground-fault protection on. It is also the common pick on remodels and new construction where the panel is being brought up to current dual-protection requirements.
How fast can I get the Leviton LB120-DFT 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-DFT come with a warranty?
Absolutely. The Leviton LB120-DFT 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-DFT?
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