Siemens | SHND6B120LSIG | Circuit Breaker | 1200A | 3-Pole | 600V

Designed for demanding electrical distribution, the Siemens SHND6B120LSIG circuit breaker delivers dependable overcurrent protection for 3‑phase systems up to 600V with a 1200A rating. This OEM Siemens part is ideal for maintenance, retrofit, and replacement tasks where exact specs matter and compatibility is non‑negotiable.

Key specs

• Amperage: 1200A
• Poles: 3‑Pole
• Voltage: 600V

What makes this breaker the right choice

Designed to match the exact form factor and electrical characteristics of your existing installation, this SHND6B120LSIG part ensures reliable protection without forcing compromises on panel layout or wiring. The three‑pole configuration provides synchronized trip across all phases, helping prevent unbalanced faults and equipment damage in motors, drives, and other heavy loads.

Ideal use cases

• Retrofits in industrial control panels where a Siemens 3‑pole, 600V device is required
• Maintenance replacements to restore original protection levels after wear or fault events
• New or upgraded power distribution schemes in manufacturing lines, data centers, or large commercial facilities that operate 3‑phase loads

How it benefits your operation

With a robust 1200A rating, this breaker can interrupt high fault currents quickly, helping to safeguard motors, transformers, and switchgear. By using the exact part number SHND6B120LSIG, you're ensuring compatibility with Siemens panels and accessory fitments, reducing installation guesswork and downtime.

Important installation and compatibility notes

Fit and ratings confirmation required: Before ordering, verify that SHND6B120LSIG matches your panel or bus assembly and that its amperage, poles, and voltage align with system requirements. The part number is the most reliable reference for compatibility.

Practical tips for installers

• Turn off service power and follow lockout/tagout procedures before replacing any circuit breaker.
• Compare the part number on the replacement with the original to ensure a precise match.
• Follow manufacturer torque recommendations and enclosure clearance guidelines to ensure secure termination and cooling.