Eaton KD3400FS 400A 3-Pole 600 V Circuit Breaker

Engineered by Eaton, the KD3400FS 400A 3-Pole 600V Circuit Breaker delivers dependable, high-capacity protection for demanding industrial power distributions. Built to endure the rigors of continuous operation in 3-phase systems, this breaker safeguards motors, feeders, and electrical panels from overloads and short circuits, while enabling straightforward maintenance and fast reset when the fault is cleared.

Key advantages

• 400 A current rating provides robust protection for high-demand circuits and large equipment loads.
• 3-pole design ensures true three-phase protection with coordinated disconnection, preserving system balance and safety.
• 600 V voltage capability makes it suitable for industrial power distribution environments that run on higher voltage levels.
• KD3400FS part compatibility ensures reliable integration with existing Eaton panels, switchgear, and protection schemes, reducing replacement and retrofit friction.
• Durable, field-reliable performance built to withstand routine operation in commercial and industrial settings, supporting long service life in challenging environments.

Ideal applications

• Industrial facilities with three-phase power distribution, such as manufacturing lines and processing plants.
• Large commercial buildings and data centers that rely on dependable 600V three-phase protection.
• Feeders and main distribution circuits where a single fault could impact multiple loads or motors.
• Panel upgrades or replacements in Eaton-compatible electrical systems, helping to maintain code-compliant protection without extensive rewiring.

Practical impact and use cases

With the KD3400FS, you gain precise, reliable interruption of fault currents, reducing the risk of equipment damage, insulation failures, and unexpected downtime. Its 3-pole architecture ensures synchronized disconnection across all three phases, which is critical for protecting motors, drives, and other three-phase equipment. In daily operations, this translates to fewer nuisance trips, quicker fault isolation, and smoother maintenance cycles, all while keeping your power system compliant with industry standards for 600V distribution.

Why choose this Eaton breaker

Choosing the KD3400FS means relying on a trusted protection solution from a legacy brand known for compatibility and predictable performance. Its design aligns with Eaton’s protection philosophy—clear, actionable protection for critical loads, straightforward installation, and a strong track record in real-world industrial environments. For facilities already invested in Eaton’s ecosystem, the KD3400FS offers a seamless pathway to robust, scalable three-phase protection.

Specifications snapshot

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V
• Part number: KD3400FS

For engineers and procurement teams evaluating industrial protection, the KD3400FS 400A 3-Pole 600V Circuit Breaker stands out as a dependable, high-capacity choice that aligns with three-phase distribution needs while offering straightforward integration within Eaton-powered infrastructures.