Schneider Electric | CK400NN | Circuit Breaker | 3-Pole

Meet the Schneider Electric CK400NN — a purpose-built 3-Pole Circuit Breaker crafted for dependable protection in maintenance, retrofit, and replacement projects where exact specifications matter. This unit is designed to slot into compatible Schneider Electric panels and assemblies with precision, helping you keep electrical systems safe and downtime minimal.

• Exact compatibility reference: The CK400NN part number is the most reliable guide for matching breakers to your existing panel and accessory lineup.
• 3-Pole protection: Specifically designed for three-phase circuits, supporting coordinated protection across multiple conductors.
• Ideal for replacements and retrofits: A targeted choice when you need a direct substitute that aligns with original specs, reducing rework and uncertainty.
• Smart purchasing note: Confirm the breaker’s fit and ratings before ordering to ensure seamless installation and electrical safety.

This breaker is especially well-suited for electrical professionals and facilities teams managing commercial or light industrial panels that require reliable 3-phase protection. By choosing CK400NN, you simplify cross-reference management and streamline procurement—relying on a well-known, traceable part number rather than opaque substitutions.

Use cases and practical guidance:

• Maintenance tasks where a direct, spec-matched replacement is essential to preserve panel performance.
• Retrofits that demand an exact cross-reference to avoid panel modification or rewiring.
• Upgrades in systems that previously used a CK-series device, ensuring consistent protection characteristics and compatibility.

In short, the CK400NN 3-Pole Circuit Breaker from Schneider Electric delivers clear compatibility, reliable three-phase protection, and a straightforward path to maintenance and retrofit success. Verify the fit and ratings against your documentation, reference the CK400NN part number for exact replacement, and proceed with confidence.