Siemens LGG3B100 - 100 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Siemens LGG3B100 is a 100 A, 600 V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit protection for panelboards and load centers. Its compact, space-efficient design helps you maximize panel layout without sacrificing protection or performance.

Engineered for reliable three-phase protection, the thermal-magnetic trip unit provides stable, repeatable response to overloads and short circuits. This means you get fast magnetic tripping for instantaneous fault events and thermal protection for sustained overloads, reducing the risk of equipment damage and downtime in demanding electrical environments.

Designed for seamless integration, the LGG3B100 is compatible with matching OEM load centers and panelboards, ensuring clean fit and consistent electrical performance. This makes it an ideal choice for residential, commercial, and light industrial applications where a rugged, proven protection solution is required.

• Amperage rating: 100 A
• Voltage rating: 600 V
• Poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Part number: LGG3B100
• Manufacturer: Siemens

Practical use cases

• Protect three-phase feeders in commercial and light industrial panelboards, safeguarding motors and other three-phase equipment
• Upgrade or replace aging breakers in OEM-compatible panels with a compact, reliable alternative
• Install in residential-commercial mixed-use installations where robust branch-circuit protection is required for three-phase systems

Why choose the LGG3B100 over other options?

• Compact molded case design that preserves panel space while delivering full protection
• Thermal-magnetic trip unit for stable, predictable performance across varying loads and temperatures
• Direct compatibility with matching Siemens OEM panelboards and load centers for streamlined installation
• Specific suitability for 3-pole, 100 A circuits in 600 V systems, aligning with common commercial and light industrial electrical architectures

Whether you’re building out a new commercial service, updating a panelboard in a light industrial setting, or replacing a worn-out breaker, the Siemens LGG3B100 provides precise trip characteristics, reliable protection, and a compact footprint that helps you keep electrical systems safe and compliant.