Eaton Cutler-Hammer KDB3400W 400A 3P 600V Circuit Breaker | AmpState

Eaton Cutler-Hammer KDB3400W is a 400 Amp, 3-pole, 600-volt circuit breaker designed to protect panelboards, load centers, and electrical distribution networks. This unit is a smart choice for maintenance teams, panel builders, and spare-part inventories where a direct part-number match matters, delivering a reliable, ready-to-install solution when it’s needed most.

Key specifications at a glance

• Amperage: 400 A
• Poles: 3
• Voltage: 600 V
• Applications: panelboards, load centers, and electrical distribution
• Part number: KDB3400W
• Availability: from AmpState

Why it matters for real-world electrical protection

The KDB3400W is purpose-built for demanding environments where three-phase distribution and high-capacity protection are essential. Its 400 A rating makes it suitable for guarding feeders and critical circuits in industrial and commercial facilities, while the 3-pole design aligns with standard three-phase systems. By offering a direct part-number match, it simplifies procurement and interchangeability, helping you maintain consistent protection across panels without guesswork.

Practical use cases

• Maintaining service reliability in large panelboards and distribution boards where downtime is costly.
• Standardizing spare inventory with a direct-fit part number to speed replacements in the field.
• Planning panel rebuilds or upgrades where a precise 400 A, 3P, 600 V breaker is required.
• Managing electrical distribution in facilities with heavy three-phase loads that demand robust overcurrent protection.

What makes this option stand out

Unlike generic substitutes, the KDB3400W is explicitly designed for Eaton Cutler-Hammer panel systems, ensuring compatibility and predictable performance in distribution networks. The emphasis on a direct part-number match minimizes installation guesswork and accelerates maintenance workflows, so teams can align replacements with existing specifications and schematics.

How AmpState supports your purchase

AmpState offers the KDB3400W with straightforward availability. If you’re unsure about fit, AmpState can help you confirm compatibility and ensure you’re pulling the exact part you need. Reach out for personalized assistance in selecting the correct breaker for your panel configuration and maintenance plan.

Who is this ideal for?

• Maintenance teams responsible for uptime in industrial and commercial facilities
• Panel builders and distributors seeking reliable, direct-fit components
• Facilities managers who maintain spare inventories to reduce downtime during outages

When you need a dependable, three-phase protection solution built for panelboards and distribution networks, the Eaton Cutler-Hammer KDB3400W delivers clear compatibility, solid performance, and streamlined maintenance—backed by AmpState’s availability and support.