Siemens SND6B120LSIG 1200A 3-Pole 600 V Circuit Breaker Potential Transformer

The Siemens SND6B120LSIG 1200A 3-Pole 600 V Circuit Breaker with Potential Transformer is built for heavy-duty electrical distribution where protection and precise monitoring are essential. With a 1200 A current rating and a 3-pole design, this device reliably interrupts all phases on fault, helping safeguard motors, transformers, and downstream equipment while reducing downtime. The integrated potential transformer provides direct sensing for metering and relay signaling, enabling smarter protection coordination and easier remote monitoring within a Siemens protection ecosystem.

Key advantages

• 1200 A current rating delivers robust protection for high-demand feeders and main circuits
• Three-pole configuration ensures synchronized interruption across all phases for balanced protection
• 600 V voltage rating suits typical industrial power distribution networks
• Built-in potential transformer enables accurate voltage sensing, metering, and relay communication
• Seamless integration with Siemens switchgear and protection systems for streamlined installations
• Durable construction designed to withstand demanding industrial environments

Ideal applications

• Main breakers in large industrial distribution panels and service entrances
• Protection and monitoring for high-current feeders feeding motors, pumps, and transformers
• Data centers and commercial facilities where reliable protection and remote monitoring are priorities

Why choose the SND6B120LSIG

This Siemens model differentiates itself with an integrated potential transformer, reducing wiring complexity and providing immediate sensing for metering and control schemes. It’s designed for installers and facility operators who need a dependable, plug-ready protection device that complements Siemens’ broader protection and automation toolkit. The combination of high current capability, 3-pole protection, and built-in sensing makes it a practical choice for modern power systems that demand both protection and visibility.

Specifications at a glance

• Part Number: SND6B120LSIG
• Current rating: 1200 A
• Poles: 3
• Voltage rating: 600 V
• Type: Circuit Breaker with integrated Potential Transformer