Schneider Electric | NB400H | Circuit Breaker | 400A | 4-Pole | 750V

Schneider Electric's NB400H circuit breaker is engineered for demanding electrical distributions, delivering reliable protection for high-current panels. With a robust 400 A rating and a four-pole configuration, this unit is built to isolate all conductors quickly and safely, helping you maintain uptime and protect equipment.

Designed for installations where precise specs matter, the NB400H is ideal for maintenance, retrofit, and replacement projects that require exact amperage, pole count, and voltage performance.

Key specifications

• Amperage: 400 A
• Poles: 4-Pole
• Voltage: 750 V
• Part number: NB400H

What sets the NB400H apart

• High-current protection with a 400 A rating designed for heavy-duty distribution panels.
• 4-pole design provides complete isolation across all conductors, enhancing safety during maintenance and in fault conditions.
• Schneider Electric engineering ensures reliable operation in critical applications where uptime matters.
• The NB400H is your best reference for compatibility; always confirm fit and ratings before ordering to ensure seamless replacement.

Ideal use cases

The NB400H is suited for industrial power distribution points, service panels, and retrofit projects where a four-pole, high-current breaker is required. It's especially appropriate when upgrading legacy gear that demands exact 400 A protection at up to 750 V, ensuring consistent performance and protective coordination with existing gear.

Compatibility and ordering tips

Before you purchase, verify that your equipment matches the NB400H specifications: 400 A current rating, 4-pole configuration, and a 750 V rating. Because the part number is the most reliable reference for compatibility, cross-check NB400H with your panel or switchgear manufacturer documentation. If your system uses Schneider Electric components, this breaker aligns with Schneider's design philosophy and protection standards.