Schneider Electric | NB400N | Circuit Breaker | 400A | 3-Pole | 690V

Schneider Electric NB400N Circuit Breaker — a robust, high-capacity protection device designed for demanding industrial environments. With a 400 A rating across three poles and a 690 V interrupting capability, the NB400N is purpose-built for maintenance, retrofit, and replacement projects where precise specifications and dependable protection matter.

• Ampere rating: 400 A
• Poles: 3-Pole configuration for balanced three-phase protection
• Voltage rating: 690 V
• Reference compatibility: Part number NB400N is the best reference for ensuring fit and compatibility
• Best-use scenarios: Ideal for maintenance, retrofit, and replacement where matching Schneider Electric specs are required

Why choose the NB400N for your electrical protection needs? This circuit breaker is engineered to reliably interrupt fault currents in three-phase systems, helping to safeguard motors, drives, and switchgear from damage and unplanned downtime. It’s not just a drop-in replacement—it's a precise fit for panels and systems designed to accept the NB400N, delivering consistent performance in mission-critical environments.

Use cases and ideal applications

• Maintenance tasks on aging or upgrading industrial panels that require a 400 A, 3-Pole, 690 V device
• Retrofit projects where existing gear expects Schneider Electric NB400N specifications
• Replacement of failed breakers in high-demand manufacturing lines, data centers, or processing facilities

Key benefits and practical considerations:

• Precise compatibility: Always verify fit and ratings before ordering; the NB400N is the clearest reference for this exact configuration.
• Three-phase protection: The 3-Pole design ensures synchronized fault interruption across all phases, improving overall electrical safety and system reliability.
• High-voltage suitability: With a 690 V rating, it’s well-matched to industrial power distributions and high-voltage switchgear common in mid-to-large facilities.
• Clear maintenance path: Using the exact part number NB400N simplifies spare parts planning and future service, reducing downtime during replacements.

This Schneider Electric NB400N circuit breaker is crafted for professionals who value precise specifications, dependable protection, and a straightforward path to retrofit or replace components in demanding electrical installations. If your system requires a 400 A, 3-Pole, 690 V circuit breaker with a Schneider Electric pedigree, the NB400N offers clarity, reliability, and peace of mind for ongoing operations.