Siemens | NJG3F400 | Circuit Breaker | 400A | 3-Pole | 480V

Engineered by Siemens, the NJG3F400 circuit breaker delivers robust protection for 480-volt systems in demanding industrial environments. With a 400-amp rating and a 3-pole configuration, it’s designed to interrupt fault currents safely and quickly, safeguarding downstream equipment and reducing the risk of extended outages.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage rating: 480V
• Part reference: NJG3F400 (best compatibility reference)

Why the NJG3F400 stands out

• Targeted maintenance and retrofit solution: Replace aging or faulty breakers with a direct-fit unit that matches existing electrical characteristics, minimizing panel reconfiguration and downtime.
• Industrial-grade protection: The 400A capacity supports heavy feeder circuits and main protection for complex distribution systems without compromising safety or reliability.
• Clear compatibility guidance: Before ordering, verify fit and ratings; using the NJG3F400 part number ensures you’re aligning with the correct Siemens panel and a 480V system.
• Efficient sourcing for replacement projects: Matching the exact model streamlines inventory and service planning, helping prevent delays in critical maintenance windows.

Practical guidance for use and install

• Always confirm your panel model and bus configuration to ensure this 3-pole, 480V device is the correct fit.
• Keep the NJG3F400 part number handy for quick verification during service calls or job quotes.
• If you’re stocking for a fleet of panels, consider keeping a spare NJG3F400 to reduce downtime when replacements are needed.

This Siemens NJG3F400 circuit breaker offers a precise, reliable solution for industrial protection where exact specifications matter. It’s a purpose-built component designed to keep critical equipment safe and operations running smoothly, not just another generic breaker.