Eaton KDC3400 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton KDC3400 is a 400 A, 600 V, 3-pole molded case circuit breaker (MCCB) engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for durability in residential, commercial, and light industrial environments, it’s a reliable choice for safeguarding wiring and equipment while keeping installation compact and organized.

Why the Eaton KDC3400 stands out

• Space‑efficient molded case design: A compact profile helps you maximize panel space without compromising protection, making it ideal for modern electrical layouts where space is at a premium.
• Thermal‑magnetic trip unit: Delivers stable, repeatable protection across varying load conditions, reducing nuisance trips and ensuring dependable performance when starting motors or handling surge currents.
• 3‑pole configuration: Provides a common trip for three‑phase systems, simplifying wiring and enhancing safety in distribution panels and three‑phase circuits.
• OEM‑level compatibility: Designed to be compatible with matching Eaton OEM loadcenters and panelboards, making replacements and upgrades straightforward without custom adaptors.
• Versatile for multiple settings: Suitable for residential, commercial, and light industrial applications, handling general branch circuit protection and short‑circuit events with confidence.

Practical use cases and scenarios

Install the KDC3400 in panelboards and loadcenters where a high‑capacity, reliable interrupt device is needed. It’s well suited for feeder branches in commercial spaces, service panels in multifamily residences, and small‑to‑mid size industrial circuits that demand solid overcurrent protection. When your system faces unbalanced loads or brief surge currents, the thermal‑magnetic trip unit helps maintain safe operation without unnecessary outages.

Who benefits most

• Electrical contractors performing panel upgrades or replacements in existing Eaton ecosystems.
• Facilities managers seeking durable, long‑lasting protection for equipment and wiring in commercial facilities.
• Installers working on light industrial distribution that requires robust branch circuit protection and reliable trip performance.

Installation and compatibility tips

To ensure seamless integration, pair the KDC3400 with compatible OEM loadcenters and panelboards from Eaton’s family. Verify that the panelboard rating and bus configurations align with a 3‑pole, 400 A, 600 V device to maintain proper trip coordination and safe shutdown behavior during faults.

Technical specifications

• Manufacturer: Eaton
• Part Number: KDC3400
• 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