Siemens LMX3B800 Circuit Breaker, 800A, 3-Pole, 600V

Meet the Siemens LMX3B800 circuit breaker — a robust, industrial-grade solution engineered for demanding electrical service, maintenance, and replacement projects. This 800 A, 3-pole device delivers reliable three-phase protection at up to 600 V, making it a cornerstone for large-scale power distribution. To ensure compatibility with your specific setup, always confirm the fit using the part number LMX3B800 and your application requirements.

Why the LMX3B800 stands out

• High-current capability: 800 A rating supports heavy loads and large motors without compromising protection or performance.
• Three-pole design: Provides balanced, three-phase protection essential for industrial equipment and distribution systems.
• 600 V operation: Suitable for common industrial power distribution architectures, ensuring compatibility with your existing infrastructure.
• Siemens ecosystem integration: Designed to fit Siemens panels and accessories, simplifying upgrades, replacements, and parts sourcing.
• Clear compatibility checks: Important note — verify fit by part number and application requirements to avoid mismatches in panelboard or bus configuration.

Ideal use cases

The LMX3B800 is well-suited for:

• Main disconnects in manufacturing facilities and processing plants where large, three-phase loads require robust protection.
• Protecting heavy-duty equipment and large motor drives in industrial control panels and switchgear.
• Replacement projects in Siemens-based systems, enabling seamless integration with existing infrastructure.
• Field service and maintenance tasks that demand a dependable, high-current breaker to minimize downtime.

What to verify before purchasing

• Part-number compatibility: Confirm that LMX3B800 matches your panel or switchgear’s requirements.
• Application alignment: Ensure the current rating, voltage, and three-pole configuration align with your system design.
• Installation considerations: Check mounting style, space, and conductor sizing to ensure a safe, code-compliant installation.

Need help matching a part number or confirming compatibility? Message us, and we’ll assist in verifying fit and application requirements for the Siemens LMX3B800 in your system.