Eaton MDL3400 400A 3P 600V Circuit Breaker | AmpState

Meet the Eaton MDL3400 — a dedicated circuit breaker built to protect panelboards, load centers, and broader electrical distribution networks. With a 400 A rating, this 3-pole device is purposefully designed for three-phase systems, delivering reliable interruption and control where high-current circuits demand dependable protection. The MDL3400 is an excellent choice for retrofit work and maintenance planning, especially when you need to preserve the exact part number for asset continuity and service records.

Key advantages

• 400 A amperage rating provides solid protection for demanding three-phase loads.
• Three-pole design suited for 3-phase power distribution.
• 600 V maximum voltage rating supports common industrial and commercial applications.
• Panelboards, load centers, and electrical distribution compatibility ensures versatile use across systems.
• Retrofit-friendly with consistent part numbers supports maintenance planning and minimizes procurement friction.
• Available from AmpState, with assistance to confirm fit and compatibility as needed.

Specifications at a glance

• Manufacturer: Eaton
• Part number: MDL3400
• Product type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V

If you’re unsure about compatibility or the exact fit for a retrofit project, we’re ready to help. Message us to confirm the MDL3400’s compatibility with your panel or distribution setup and ensure you maintain consistent part numbers across maintenance cycles. The Eaton MDL3400 from AmpState delivers reliable protection for your critical electrical infrastructure, helping keep facilities running smoothly and safely.