Leviton LB240-ST Circuit Breaker

Product Overview

The Leviton LB240-ST is a 2-pole thermal-magnetic circuit breaker rated 40 amps with a 10 kA interrupting capacity. It is intended for use as a branch-circuit protective device in residential, commercial, and industrial electrical installations.

This SKU (LB240-ST) is a single genuine Leviton breaker offered as an individual unit (EA) and is supplied by Lumera Electric for contractor and facility use.

Key Features

• 2-pole thermal-magnetic design
• 40 amp continuous rating
• 10 kA interrupting rating (10,000 A)
• Manufactured by Leviton; UPC 07847718749
• Unit weight approximately 5.0 lb

Function

The LB240-ST is a 2-pole (double-pole) thermal-magnetic circuit breaker that provides overcurrent protection by combining thermal (overload) and magnetic (short-circuit) trip mechanisms. It interrupts both poles simultaneously for multi-wire branch circuits requiring common disconnection.

• Thermal element for overload protection
• Magnetic element for instantaneous short-circuit trip
• Simultaneous two-pole interruption for 240 V circuits or multi-wire branch circuits

Key specifications

Use these verified product specifications for procurement and panel planning. Do not substitute model numbers without verification.

• Model / Item #: LB240-ST
• Poles: 2 (two-pole)
• Amp rating: 40 A
• Interrupting rating: 10 kA (10,000 A)
• Type: Thermal-magnetic circuit breaker
• UPC: 07847718749
• Unit of measure: EA
• Approximate weight: 5.0 lb

Applications

The LB240-ST is intended for use as a branch-circuit protective device in residential, commercial, and industrial electrical installations where a 2-pole 40 A breaker with a 10 kA interrupting rating is required.

• Commonly applied for 240 V loads or multi-wire branch circuits requiring simultaneous pole disconnection
• Suitable across residential, commercial, and industrial panelboards where Leviton-compatible breakers are specified

Installation considerations

Confirm panel compatibility, available space, and local electrical code requirements before ordering or installing. The product listing describes a single LB240-ST unit; verify model number and quantity needed for your project.

• Confirm the LB240-ST matches the panel manufacturer's approved breaker list before installation
• Verify physical fit, bus connection type, and mechanical compatibility with the target panel
• Confirm coordination with upstream protection and applicable electrical codes

Before You Order

Confirm the model number LB240-ST and the quantity required before ordering. Ensure the breaker is approved for use in your specific panelboard and that the 40 A rating and 10 kA interrupting capacity meet your system protection and coordination needs.

• Verify panel compatibility and manufacturer-approved breaker list
• Confirm physical fit and bus connection style with your panel
• Coordinate breaker selection with upstream protection and applicable electrical codes

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Leviton LB240-ST Circuit Breaker. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.