Eaton KD3400X - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Eaton KD3400X — a 400A, 600V, 3-pole bolt-on molded case circuit breaker crafted to protect panelboards and loadcenters with dependable, long-lasting performance. Designed for environments where durability matters, its secure bolt-on mounting delivers a rigid, vibration-resistant bus connection that minimizes movement-induced wear and ensures consistent electrical contact over time.

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays solid through equipment start-ups and routine operation.
• Thermal-magnetic trip unit provides stable, repeatable protection by accurately responding to overloads and short circuits, helping prevent damage to downstream circuits and equipment.
• 3-pole design supports three-phase distribution, making it ideal for commercial and light industrial applications where balanced power is essential.
• 400 A, 600 V rating aligns with demanding panelboard configurations, offering robust protection for high-current circuits while maintaining compatibility with standard distribution systems.
• OEM-compatible engineered to work with matching OEM loadcenters and panelboards for straightforward replacement or upgrade without modifications to wiring or mounting.
• Versatile application suitable for residential, commercial, and light industrial installations that require reliable branch overcurrent and short-circuit protection.

The KD3400X is more than just a breaker—it's a shield for critical loads. In practice, it helps keep motors, HVAC equipment, lighting, and other essential systems running smoothly by delivering precise trip thresholds and quick, predictable responses to electrical faults. Its molded case construction adds rigidity and longevity, meaning fewer service calls and more uptime in busy electrical rooms.

Key use scenarios include upgrading aging panelboards, integrating with compatible OEM loadcenters during new builds, and provisioning reliable three-phase protection in commercial spaces or light industrial facilities. If you’re seeking a high-capacity, bolt-on circuit breaker that pairs with industry-standard panelboards and delivers consistent protection across a range of operating conditions, the Eaton KD3400X is engineered to meet those demands with confidence.