Eaton CKD3400F - 400 A, 600 V Circuit Breaker | AmpState

Meet the Eaton CKD3400F—a 400 A, 600 V molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for residential, commercial, and light industrial environments, this unit combines compact footprint with precise protection, helping you maximize panel space without compromising safety.

Why the CKD3400F stands out

• Compact molded case design frees up valuable panel space, making it easier to fit after-market configurations and additional circuits in existing panels.
• Thermal-magnetic trip unit delivers stable, repeatable protection by handling both overload and short-circuit conditions. The thermal element responds to prolonged overcurrent, while the magnetic element reacts quickly to high current faults, reducing nuisance trips and improving reliability.
• 400 A, 600 V rating provides robust protection for large residential feeders, commercial subpanels, and light industrial circuits, helping to safeguard wiring, devices, and downstream equipment.
• OEM panelboard compatibility is designed to align with matching Eaton panelboard and loadcenter systems, ensuring proper fit, electrical coordination, and straightforward installation for a cohesive protection scheme.
• Versatile application purpose-built for a range of settings—from home electrical panels to commercial facilities and light industrial sites—where reliable overcurrent and short-circuit protection matters.

Ideal use scenarios

• Upgrading or replacing a protective device in residential panelboards that require a high-capacity 400 A breaker with solid protection characteristics.
• Feeding large branch circuits in commercial spaces such as offices, small data centers, and retail environments where space is at a premium.
• Subpanel installations in light industrial applications where dependable performance and panel-space efficiency are priorities.

What you gain with the CKD3400F

• Protection you can count on—thermal-magnetic trip behavior provides clear, predictable responses to overloads and faults, supporting safer, longer-lasting electrical systems.
• Efficient panel design—the compact form factor helps maximize usable space inside panelboards and load centers, making room for future expansion.
• Seamless integration—engineered for compatibility with Eaton’s OEM load centers, ensuring consistent performance and straightforward replacement or upgrade paths.

Practical installation and care tips

Install the CKD3400F in any suitable Eaton panelboard or load center designed for molded case breakers of this rating. Confirm that the panel’s bus connection and mounting arrangement match the breaker’s specifications, and follow standard electrical commissioning practices to verify proper tripping and coordination with upstream devices. Regularly inspect for signs of wear or overheating in high-load configurations to maintain reliability over time.

Choose the Eaton CKD3400F when you need a robust, space-conscious, 400 A protection solution that delivers dependable performance across residential, commercial, and light industrial applications. Its combination of a compact design, reliable thermal-magnetic trip, and OEM panel compatibility makes it a practical, long-term choice for safeguarding circuits and equipment.