Siemens SMD6B800LSI 800A 3-Pole 600 V Circuit Breaker Potential Transformer

Engineered for demanding industrial environments, the Siemens SMD6B800LSI is a 3-pole circuit breaker designed to protect power distribution with a robust 800 A current rating at up to 600 V. This part (SMD6B800LSI) combines Siemens reliability with a configuration that ensures three-phase protection for balanced, safe operation of large electrical systems.

The three-pole design guarantees simultaneous disconnection of all live conductors during a fault, reducing the risk of phase imbalance and equipment damage. The 800 A rating makes it suitable for main feeders and heavy-load circuits in industrial panels, data centers, and manufacturing lines, where fast, predictable isolation is essential.

• Current rating: 800 A
• Poles: 3
• Voltage rating: 600 V
• Part number: SMD6B800LSI
• Protection approach: three-phase interruption for coordinated relay schemes and PT-based monitoring
• Application: industrial power distribution, switchgear, and panel installations requiring reliable protection

Who benefits: electrical engineers and maintenance teams planning new builds or retrofits in factories, large office campuses, or data centers that demand dependable fault protection and straightforward integration with protective relays and potential transformer networks.

Why choose this Siemens breaker over generic alternatives? Its design and manufacturing heritage support consistent performance, easier spare-part sourcing, and compatibility with Siemens protection ecosystems, helping you maintain uptime and simplify panel servicing.

Practical usage tips: consult the official Siemens installation guidelines for torque specs on terminals, ensure correct assembly within switchgear enclosures, and verify coordination with upstream protection relays. If your system uses potential transformers for metering or relay signaling, plan wiring routes to keep PT connections secure and well-labeled for accurate protection coordination.