Leviton Plug-On Mount 2-Pole Branch Circuit Breaker, 45-Amp, 120/240-Volt
The Leviton Plug-On Mount 2-Pole Branch Circuit Breaker delivers dependable overcurrent protection for 120/240-Volt electrical systems. Configured as a standard branch circuit breaker rated at 45-Amp, this 2-pole unit uses a plug-on mounting style for fast, secure installation into compatible panelboards. Built by Leviton for professional and residential electrical work, it's designed to protect branch circuit wiring from overload and short-circuit conditions while supporting reliable, code-conscious panel design.
Key Features
- 2-Pole Configuration: Provides two-pole overcurrent protection suited to 120/240-Volt branch circuits requiring double-pole switching.
- 45-Amp Rating: Sized to protect branch circuit conductors and connected loads at a 45-Amp continuous rating.
- 120/240-Volt Rated: Matched to standard residential and light commercial single-phase panelboard voltage systems.
- Plug-On Mount: Installs directly onto the panelboard bus with a plug-on connection for quick, tool-efficient placement.
- Standard Branch Circuit Breaker: Functions as a standard-type breaker for general branch circuit overcurrent protection.
- Leviton Build Quality: Manufactured by Leviton, a recognized name in electrical wiring devices and circuit protection components.
Technical Specifications
- Poles: 2-Pole
- Amperage: 45-Amp
- Voltage: 120/240-Volt
- Mounting Style: Plug-On
- Breaker Type: Standard Branch Circuit Breaker
- list_batch: LEV-20260730
Typical Applications
- Residential Load Center and Panelboard Wiring
- Light Commercial Electrical Panels
- Branch Circuit Overcurrent Protection
- Panel Upgrades and Circuit Additions
- New Construction and Renovation Electrical Work
Why Leviton?
Leviton is a long-established manufacturer of electrical wiring devices and circuit protection products, and this plug-on mount 2-pole branch circuit breaker reflects that focus on dependable, panel-ready construction. With a 45-Amp, 120/240-Volt rating and a standard plug-on mounting style, it's built to fit common panelboard configurations and support reliable circuit protection for professional electrical installations.
Manufacturer Resources
Technical Information
Product Specs
- Product Type:
- Circuit Breaker
- Connection Type:
- Plug-On Mount
- Amperage Rating:
- 45A
- Voltage Rating:
- 120/240V
- Poles:
- 2
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Subgroup:
- Smart Controls
Leviton LB245-T – Frequently Asked Questions
1) Will the Leviton LB245-T 45A breaker fit my existing panel?
The LB245-T is a plug-on mount breaker, so it snaps onto the panelboard bus rather than bolting on or clipping to a DIN rail. It fits Leviton load centers and panelboards that accept Leviton plug-on branch breakers. If your panel is bolt-on or DIN rail, this is the wrong mounting style and you need a breaker built for that connection.
2) Is a 2-pole 45-amp breaker the right size for a 240V circuit like an A/C condenser or subpanel feed?
Two poles at 45 amps, 120/240V, is a double-pole breaker that opens both ungrounded conductors of a single-phase 240V circuit. Size it to the conductor and the equipment nameplate: 45A sits between the common 40A and 50A sizes, so it is typically specified where equipment maximum overcurrent protection calls for 45A exactly, such as some HVAC condensing units and small feeders. If your nameplate says 40A or 50A max, use that size instead, not this one.
3) Can I use the Leviton LB245-T on a 208Y/120 three-phase commercial panel?
No. The LB245-T is rated 120/240V, which is single-phase residential and light commercial service. A 208Y/120 three-phase panelboard needs a breaker rated for that system. For three-phase and higher-capacity distribution equipment, look at a molded case breaker line such as Square D PowerPacT B or the PowerPacT Q I-Line, which are built for panelboard and switchboard distribution rather than a residential load center bus.
4) Can I use a Square D Multi9 C60 instead of a 2-pole 45A Leviton breaker?
Not as a direct swap. The Leviton LB245-T is a 2-pole breaker for 120/240V branch circuits, which is what a 240V load such as a dryer, water heater, or condensing unit requires. The Square D Multi9 C60 in the C-curve version is a 1-pole miniature circuit breaker rated 120V AC, so it covers a single hot conductor on a 120V circuit. A 240V two-wire load needs both ungrounded conductors opened together, which is the 2-pole configuration the LB245-T provides.
5) Can the LB245-T replace a single-pole breaker in my panel?
Not in one slot. Being a 2-pole device, it occupies two adjacent spaces in the panel and lands on both bus legs to pick up 240V. If you only have one open space, you need a single-pole breaker; a single-pole product such as the Square D Multi9 C60 1-pole is a different animal again since that one is DIN rail gear rather than a load center breaker.
6) Does the Leviton LB245-T have GFCI or AFCI protection built in?
No. This is a standard thermal branch circuit breaker: overload and short-circuit protection only. Circuits that require ground-fault or arc-fault protection under your local code need a dedicated GFCI or AFCI breaker of the matching amperage, or protection at the device.
7) When would a contractor use a PowerPacT molded case breaker rather than a plug-on branch breaker?
It comes down to where the breaker sits in the distribution. The Leviton LB245-T is a standard branch circuit breaker, plug-on mount, sized at 45A on 120/240V, and it lives in a load center feeding individual circuits. The Square D PowerPacT B is a thermal magnetic molded case circuit breaker, and the PowerPacT Q is an I-Line breaker, meaning it bolts into an I-Line panelboard interior rather than plugging onto residential-style stabs. Feeder and main positions in commercial panelboards are typically where the PowerPacT devices are applied; the branch positions in a plug-on load center are where the LB245-T is applied.
8) Is a miniature circuit breaker the same thing as a residential plug-on breaker?
They are different families even though both open a branch circuit. Miniature circuit breakers such as the Square D C60 UL489 device and the Multi9 C60 are rail-mounted units associated with equipment and control panel work. The Leviton LB245-T is a plug-on mount branch circuit breaker for 120/240V panelboards, which is the style a load center bus accepts. Ordering an MCB for a job that calls for a plug-on breaker leaves you with a device that has no way to land on the panel bus.
9) What part number do I order for the Leviton 45-amp double-pole breaker?
Order Leviton LB245-T. That is the full catalog number for the 45A, 2-pole, 120/240V plug-on breaker, and it is the only configuration under it, so there are no finish or trim options to specify.
10) Where can I get the technical data for the Leviton LB245-T breaker?
Leviton publishes technical information for this breaker in a PDF that ZenSupply hosts with the product, covering the plug-on 2-pole branch breaker line. Electricians pulling permits or matching an existing panel schedule usually want that sheet alongside the 45A, 120/240V ratings.
How fast can I get the Leviton LB245-T delivered?
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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 LB245-T come with a warranty?
Absolutely. The Leviton LB245-T is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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