Siemens LMX3B800L 800A 3-Pole 600 V Circuit Breaker

Siemens LMX3B800L is a rugged, industrial-grade circuit breaker designed to protect demanding three‑phase power distribution. With an 800 A current rating and a 3‑pole configuration, this 600 V device delivers reliable overcurrent protection for large motors, feeders, and switchgear in heavy‑duty environments. Part Number LMX3B800L, engineered by Siemens to integrate seamlessly with Siemens panels and gear, it’s built to keep critical processes running smoothly.

Key specifications at a glance

• Current rating: 800 A
• Poles: 3
• Voltage rating: 600 V
• Part number: LMX3B800L
• Application: Three‑phase protection for industrial power distribution, compatible with Siemens panels and switchgear

Why this Siemens circuit breaker stands out

• High‑capacity, three‑phase protection: The 800 A rating is ideal for protecting large motors, pumps, conveyors, and other heavy loads in manufacturing plants and facilities with substantial power demands.
• Direct compatibility with Siemens systems: Designed to integrate into Siemens electrical infrastructure, helping streamline installation, maintenance, and replacement without aftermarket guesswork.
• Durable, dependable performance: Built to withstand industrial operating conditions, delivering consistent protection and ease of troubleshooting in daily operations.
• clear identification and lifecycle: Part Number LMX3B800L makes ordering, stocking, and service planning straightforward for OEMs and maintenance teams.

Ideal use cases

• Main distribution panels feeding large three‑phase equipment and machinery in manufacturing facilities
• Motor control centers and switchgear where reliable 800 A protection is required
• Retrofits or upgrades of legacy systems that demand Siemens‑approved, high‑capacity circuit protection

Practical installation and care tips

When integrating the LMX3B800L, follow standard Siemens installation guidelines for wiring practices, enclosure compatibility, and terminal torque. Ensure the device sits in a suitable environment for industrial use and is wired to properly protected three‑phase feeders. Regular inspection of connectors and enclosure integrity helps maintain optimal performance over time. For replacements or audits, reference the Part Number LMX3B800L to guarantee exact specifications match your existing Siemens configuration.