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circuit-breaker

Siemens LGG3B040 - 40 A, 600 V, 3-Pole Circuit Breaker | AmpState

★★★★★
Part Number LGG3B040
Amperes 40
Poles 3
Voltage 600
Product Type circuit-breaker
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Manufacturer :Siemens
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Replacement available
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Picture available on request
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CSA / UL Approved
Regular price $710.00
Sale price $710.00 Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.

Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.

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Secure transaction
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FREE & fast shipping on orders over $49
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CSA approved with 1 year warranty
Icon
30 day returns
Siemens LGG3B040 - 40 A 600 V 3-Pole Circuit Breaker | AmpState - Circuit Breakers

Siemens LGG3B040 - 40 A, 600 V, 3-Pole Circuit Breaker | AmpState

Regular price $710.00
Sale price $710.00 Regular price
Unit price
Product description
Shipping

The Siemens LGG3B040 is a 40A, 600V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. This compact device brings robust performance to spaces where panel real estate matters, helping electrical systems stay safe without crowding the enclosure.

Key features that set the LGG3B040 apart include a compact molded-case design for efficient use of panel space and a thermal-magnetic trip unit that provides stable, repeatable protection performance across a range of operating conditions. The 3-pole configuration is ideal for three-phase distributions common in commercial and light industrial environments, while remaining suitable for residential installations where three-phase protection is required.

  • Compact molded-case design: Optimizes panel layout and simplifies installation in crowded or retrofit panelboards and load centers.
  • Thermal-magnetic trip unit: Delivers stable, repeatable protection to guard against both overloads and short circuits.
  • 3-pole configuration: Supports three-phase circuits, expanding protection for modern commercial and light industrial setups.
  • 600V, 40A rating: Suitable for a wide range of branch circuits and distribution feeders up to 600 volts.
  • OEM-compatible: Designed to be compatible with matching Siemens OEM load centers and panelboards for straightforward installation and reliable performance.
  • Versatile applications: Appropriate for residential, commercial, and light industrial projects that require reliable overcurrent and short-circuit protection.

Ideal use scenarios include upgrading panel protection in small offices, workshops, and service rooms where 3-phase power is present, as well as retrofit tasks in existing Siemens panel systems. This breaker helps ensure that critical circuits—whether powering lighting, HVAC, or controlled equipment—remain protected under fault conditions, while aligning with Siemens’ ecosystem for consistent performance and compatibility.

Technical specifications at a glance:

  • Manufacturer: Siemens
  • Part number: LGG3B040
  • Type: Thermal-magnetic molded case circuit breaker
  • Amperage rating: 40A
  • Voltage rating: 600V
  • Number of poles: 3
  • Application: Branch circuit overcurrent and short-circuit protection

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4.9 (38 reviews)

General feedback we often hear from customers purchasing industrial electrical parts.

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Exactly what we needed for a shutdown replacement. No surprises.

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Looks and feels like a proper industrial-grade part. Works as expected.

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