Siemens | LMXD63B500L | Circuit Breaker | 500A | 3-Pole | 600V

Siemens LMXD63B500L is a rugged, high-capacity circuit breaker built for demanding industrial electrical distributions. With a 500A rating, a 3-pole configuration, and a 600V maximum, this unit is purpose-built for large feeders and motor circuits where reliable protection is essential. It’s ideal for maintenance, retrofit, and replacement projects where exact specifications must match your existing Siemens setup.

Key specifications

• Amperage: 500 A
• Poles: 3-Pole
• Voltage: 600 V
• Part reference: LMXD63B500L

Why this Siemens breaker stands out

Designed to integrate seamlessly with Siemens panels and distribution systems, the LMXD63B500L delivers consistent protection across all three phases. The 3-pole arrangement ensures balanced fault protection, minimizing the risk of phase imbalances that can stress equipment. Built with Siemens engineering standards, it supports reliable operation in environments where uptime matters, helping maintenance teams reduce downtime during replacements or upgrades.

Ideal use cases

• Replacing a failed or worn-out 500A, 3-pole breaker in Siemens-compatible panels
• Retrofits where existing equipment requires a matching LMXD63B500L specification
• Maintenance stocking for manufacturing lines, large motor feeders, and critical distribution circuits

Compatibility and ordering notes

To ensure a perfect fit, confirm the exact match to your panel and load requirements before ordering. The part number LMXD63B500L is the most reliable reference for compatibility. Always verify fit and ratings with your panel’s documentation and the manufacturer’s guidelines to avoid mismatches in interrupting capability or bus configuration.

Practical tips for installation and use

• Match the breaker's amperage and pole configuration to the protected circuit to maintain proper coordination with upstream protection devices.
• Keep a spare LMXD63B500L on hand for preventive maintenance in facilities with high electrical load demands.
• Document the replacement part number in your asset management system to simplify future maintenance and audits.