Eaton Kdb3400Ft32W - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Eaton Kdb3400Ft32W—a 400 A, 600 V, 3-pole molded case circuit breaker designed to protect branch circuits with precision in panelboards and loadcenters. This unit delivers reliable overcurrent and short-circuit protection for residential, commercial, and light industrial installations, while making efficient use of valuable panel space.

What makes it stand out

• Compact molded case design that frees space in crowded electrical panels without sacrificing protection.
• Thermal-magnetic trip unit provides stable, repeatable protection across a wide range of fault conditions, reducing nuisance trips and improving reliability.
• 3-pole configuration for full three-phase protection and balanced fault handling in larger circuits.
• 400 A continuous current rating paired with a 600 V maximum working voltage supports feeders and main distribution in modern panelboards.
• Designed for seamless compatibility with matching Eaton OEM loadcenters and panelboards, simplifying retrofit or new installations.
• Versatile for residential, commercial, and light industrial settings where dependable branch-circuit protection matters.

Applications and use cases

Use the Kdb3400Ft32W as the main protector in service panels and as a feeder breaker in commercial or light industrial panels. It’s ideal for protecting heavy-load feeders, machine circuits, and critical branch circuits where a robust 400 A protection threshold is required. Its compact profile helps you maximize panel density in tighter electrical rooms or retrofit projects where space is at a premium.

Installation and compatibility

Built to work with matching Eaton OEM loadcenters and panelboards, this molded-case breaker ensures consistent trip performance and mechanical fit. Confirm the amperage rating, voltage, and pole count match your panel’s catalog requirements before installation to guarantee seamless operation and maintain system protection integrity.

Technical snapshot

• Manufacturer: Eaton
• Part Number: Kdb3400Ft32W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection