ABB XT5NU340AFYN000XXX 400A 3P 600V Circuit Breaker | AmpState

Meet the ABB XT5NU340AFYN000XXX 400A 3P 600V circuit breaker—engineered for dependable everyday electrical protection in panelboards, load centers, and distributed electrical systems. Built to handle demanding commercial and industrial environments, this 3-pole unit delivers confident safeguarding of feeders and main lines, helping you keep critical circuits energized with precision.

Key specifications at a glance
400 A rating • 3 poles • 600 V

This XT5NU340AFYN000XXX is ideal for replacement projects and spare stocking, especially when your maintenance BOM requires the exact original part number. Keeping the BOM aligned to the specified ABB part ensures your protection scheme remains intact and compatible with existing wiring, bus configurations, and panel interfaces. It’s the practical choice when you need a dependable, on-the-shelf solution that fits right into established installations.

Why choose this ABB circuit breaker?

• Reliable protection for panelboards, load centers, and electrical distribution networks in commercial and light industrial settings.
• Exact fit for projects requiring the original XT5NU series part number, simplifying replacements and spare inventory management.
• Clear compatibility pathway: AmpState offers assistance to confirm fit and part-number alignment, reducing guesswork during upgrades or repairs.
• Stock-ready practicality: maintain uptime with a readily available, high-capacity 400 A breaker that handles demanding load profiles efficiently.

Whether you’re upgrading a service, performing a routine replacement, or stocking spare parts to minimize downtime, the ABB XT5NU340AFYN000XXX delivers clear, tangible value. Ready to verify compatibility or place an order? AmpState is standing by to confirm fit and get you the right part quickly.