Exactly what we needed for a shutdown replacement. No surprises.
Plant · Shutdown
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| Part Number | LGG3B040 |
| Amperes | 40 |
| Poles | 3 |
| Voltage | 600 |
| Product Type | circuit-breaker |
Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
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.
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:
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General feedback we often hear from customers purchasing industrial electrical parts.
Exactly what we needed for a shutdown replacement. No surprises.
Plant · Shutdown
Good communication and clear updates while the order was processed.
Project · Coordination
Looks and feels like a proper industrial-grade part. Works as expected.
Service · Field install