Schneider Electric | CK400N | Circuit Breaker | 400A | 3-Pole

Schneider Electric CK400N is a genuine 400A, 3-pole circuit breaker built to protect power distribution in demanding industrial and commercial environments. Designed for maintenance, retrofit, and replacement projects, this breaker delivers exact-spec compatibility so your system stays safe, compliant, and up to code without unnecessary downtime.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Part number: CK400N

Why this breaker matters for your system

Choosing the CK400N means opting for a like-for-like replacement that preserves the integrity of your existing protection scheme. It’s purpose-built for installations where matching specs are non-negotiable, reducing the risk of incompatibilities and ensuring predictable electrical behavior across your panels and feeders. With Schneider Electric’s engineering backing, you get dependable performance aligned with your current protection strategy.

Ideal use cases

• Maintenance of existing Schneider Electric panels and gear that require a 400A, 3-pole solution
• Retrofit projects where upgrading or restoring protection without changing the panel design is necessary
• Replacement scenarios for failed or worn-out breakers in compatible systems

Compatibility and ordering tips

For a seamless fit, confirm fit and ratings before ordering. Use the CK400N part number as the best reference to verify compatibility with your panel, bus arrangement, and electrical requirements. This part is specifically suited for environments that rely on Schneider Electric’s protection philosophy and system interoperability.