Eaton | DK3400K | Circuit Breaker | 400A | 3-Pole

Engineered by Eaton, the DK3400K is a heavy‑duty circuit breaker designed for demanding three‑phase power distribution. With a 400A rating and a 3‑pole configuration, it delivers reliable protection for large‑load panels, motor control centers, and industrial distribution gear.

Built for maintenance, retrofit, and replacement projects where exact specifications matter, the DK3400K helps you keep systems up and running without guesswork. The part number DK3400K is the most reliable reference when verifying compatibility with your Eaton panel or switchgear.

Key specifications

• Amperage: 400A
• Poles: 3‑Pole (three‑phase protection)
• Reference: Part number DK3400K for compatibility checks

Why this matters

In industrial settings, a precise match is critical for safe, effective protection. The DK3400K’s 400A rating aligns with common three‑phase distributions in manufacturing floors, data centers, and process lines, helping prevent overcurrents while enabling planned maintenance and replacements with minimal downtime.

Ideal use cases

• Maintenance: Replace aging breakers in service panels to restore reliable protection.
• Retrofit: Update older installations to current spec breakers without changing wiring or mounting.
• Replacement: Ensure continuity of protection by matching the original part number during material replacements.

Practical guidance

Before ordering, confirm fit and ratings against your specific equipment. The DK3400K is the definitive reference for compatibility—keep the part number handy during procurement to avoid mismatches and ensure safe, compliant operation.