Eaton KDB3400W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Engineered by Eaton, the KDB3400W is a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to deliver unwavering branch circuit protection and reliable short-circuit interruption in panelboards and load centers. Its robust design targets the demanding environments of residential, commercial, and light industrial electrical installations, ensuring your critical circuits stay safeguarded when it matters most.

Why the KDB3400W stands out

• Secure bolt-on mounting: A rigid connection to the bus helps resist vibration-induced movement, maintaining a dependable feed and reducing wear over time in busy panel environments.
• Thermal-magnetic trip unit: Dual‑element protection offers stable, repeatable response to overloads and rapid interruption during short circuits, helping minimize damage to wiring and connected equipment.
• OEM-compatible design: Specifically engineered to integrate with matching OEM load centers and panelboards, promoting consistent performance and straightforward replacement or upgrades.
• Versatile application: Ideal for residential service panels, commercial distribution boards, and light industrial installations that require robust 400 A protection at up to 600 V.

Technical snapshot

• Manufacturer: Eaton
• Part number: KDB3400W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 400 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards/load centers

Practical use cases and benefits

The KDB3400W is an excellent choice when upgrading or replacing protection on large-draw circuits in panelboards or load centers. Use it to shield feeders and main branch circuits in spaces prone to vibration or where a rigid, durable connection is essential for long-term reliability. Its thermal-magnetic characteristics help prevent nuisance tripping from gradual heating while still delivering swift interruption during high‑fault events, reducing the risk of damage to downstream equipment.

Ideal for

• Residential panel upgrades requiring high-capacity protection for major feeders
• Commercial distribution boards that demand dependable 3‑pole, 400 A protection
• Light industrial electrical rooms where vibration resistance and reliability are priorities

Choose the Eaton KDB3400W for a dependable, compatible, and performance-focused solution that aligns with your panelboard or load center’s design intent, while delivering clear protection against overcurrent and short circuits.