Eaton Cutler-Hammer KD3400F 400A 3P 600V Circuit Breaker | AmpState

Eaton Cutler-Hammer KD3400F is a 400 A, 3-pole, 600 V circuit breaker engineered to deliver reliable circuit protection in panelboards, load centers, and electrical distribution systems. Built for demanding industrial and commercial environments, it combines dependable performance with straightforward installation and maintenance planning.

What makes the KD3400F stand out:

• Part-number stability for retrofit and service work: keeping the KD3400F consistent simplifies maintenance, inventory management, and labeling when upgrading or replacing components.
• Three-pole protection: ensures balanced fault interruption across all three phases, simplifying wiring and improving system safety in multi-bus distributions.
• 600 V rating tailored to common industrial power distributions, providing dependable protection for large feeders and complex electrical layouts.
• Ready availability through AmpState: convenient sourcing, fast support, and expert guidance to confirm fit with your panelboard or load center.
• Designed for panelboards, load centers, and broader electrical distribution networks, with practical compatibility for retrofits and ongoing maintenance planning.

Ideal for:

• Electricians and contractors performing retrofit projects who need to preserve the same part number to avoid re-labeling or wiring changes.
• Facility managers building a reliable spare-parts strategy to minimize downtime during outages or routine maintenance.
• Industrial facilities and commercial sites requiring stable, high-capacity protection for feeders and distribution circuits.

Technical snapshot:

• Manufacturer: Eaton Cutler-Hammer
• Part Number: KD3400F
• Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V
• Applications: Panelboards, load centers, electrical distribution

Practical procurement notes:

• When ordering, verify compatibility by matching the KD3400F part number to your equipment and ensuring the trip characteristics align with system protection requirements.
• Keeping a KD3400F on hand supports efficient maintenance planning and reduces downtime by enabling drop-in replacements for compatible Eaton systems.
• If you’re unsure about fit, AmpState provides assistance to confirm compatibility and ensure the part will integrate with your existing setup.