Schneider Electric | NSX400S | Circuit Breaker | 400A | 4-Pole

Schneider Electric NSX400S — a 400A, 4-Pole Circuit Breaker designed for demanding electrical environments where precise protection and dependable uptime matter. Built to support maintenance, retrofit, and replacement projects, this NSX-series breaker delivers the familiar Schneider Electric protection you rely on, with exact specifications that fit your existing system.

Key compatibility and procurement notes ensure you get the right fit the first time. The part number is the best reference for compatibility, so confirm the fit and ratings of the NSX400S before ordering to avoid downtime or mismatched trip characteristics. This approach keeps your panel aligned with current requirements while preserving the integrity of your protection scheme.

• Amperage: 400 A
• Poles: 4-Pole
• Compatibility: Best reference is the part number NSX400S; verify fit and ratings to ensure seamless replacement.
• Application: Ideal for maintenance, retrofit, and replacement projects where exact specifications are required
• System integration: Designed to integrate with Schneider Electric NSX-series panels and related electrical infrastructure for consistent protection

Practical use scenarios

• Upgrading or maintaining industrial control panels where legacy breakers are out of date or out of spec
• Retrofits to align with newer safety standards or capacity planning without redesigning the enclosure
• Replacement in NSX-compatible systems to restore original protection curves and reliability

Why this matters: choosing the NSX400S preserves the intended switching and protection characteristics of your NSX ecosystem, minimizes panel modification needs, and simplifies commissioning and testing after installation. By sticking with the NSX400S as the exact part reference, you maintain consistency across your protection lineup and reduce the risk of compatibility gaps.