Schneider Electric | NS400N | Circuit Breaker | 400A | 3-Pole | 690V

The Schneider Electric NS400N circuit breaker is a purpose-built solution for demanding industrial panels, delivering reliable protection for three-phase electrical systems up to 690V. With a robust 400A rating and a 3-pole configuration, it’s crafted for maintenance, retrofit, and replacement tasks where exact specifications matter—and where downtime is costly.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 690 V
• Part number: NS400N (best reference for compatibility)

What makes the NS400N unique

• Precisely sized for industrial applications that require a ready-made 400A, 3-pole, 690V solution—minimizing guesswork during retrofits and replacements.
• Designed to slot into panels and systems that rely on Schneider Electric’s compatibility standards, helping you avoid mismatches and field modifications.
• Reliable, proven performance from a trusted brand, supporting consistent protection in critical distribution paths.
• Using the NS400N part number as your primary compatibility reference simplifies ordering and reduces the risk of incorrect substitutions.

Ideal use scenarios

• Maintenance or retrofit of three-phase distribution panels in manufacturing facilities, warehouses, or processing plants.
• Replacement of failed circuit breakers where existing systems specify a 400A, 3-pole, 690V device.
• New equipment installations that require seamless compatibility with Schneider Electric breakers and existing protection schemes.
• Spare parts planning for industrial control rooms and power distribution panels operating at elevated voltages.

Fit and compatibility considerations

Always verify that the NS400N’s 400 A current rating, 3-pole configuration, and 690V voltage rating align with your panel’s requirements. Use the NS400N part number as the primary reference to ensure compatibility with your enclosure, bus bar format, and trip characteristics. Before ordering, double-check the panel manufacturer’s documentation to confirm mounting footprint and integrated protection strategy to minimize downtime and ensure reliable performance.