ABB XT5NU340ABYN000XXX 400A 3P 600V Circuit Breaker | AmpState

Meet the ABB XT5NU340ABYN000XXX, a purpose-built circuit breaker engineered for everyday electrical protection in panelboards, load centers, and distribution networks. With a 400 A rating and a three-pole design for three-phase systems at 600 V, this ABB unit is a reliable choice for demanding commercial and industrial applications. Designed for maintenance teams, panel builders, and spare inventories, it delivers a precise part-number match that minimizes installation guesswork and downtime.

Why this XT5NU model stands out

• Exact part-number match: Streamline procurement and stocking with a direct-fit, reducing compatibility concerns during maintenance or new builds.
• Three-pole protection: Supports three-phase circuits, making it ideal for multi-wire distribution panels and feeders in larger electrical systems.
• High-capacity protection: 400 A rating handles substantial load feeders, helping safeguard critical equipment and reduce the risk of nuisance trips.
• 600 V compatibility: Suitable for a range of industrial and commercial distribution environments that operate at up to 600 volts.
• Robust, dependable design: Built to endure the rigors of daily electrical work, delivering dependable interruption protection when faults occur.

Ideal use cases and practical applications

• Panelboards and load centers in commercial facilities where quick, exact replacements are essential to maintain uptime.
• Spare inventory for maintenance teams and panel builders who rely on consistent, compatible components for rapid project turnaround.
• Industrial distribution panels where three-phase protection and a strong duty rating help keep sensitive equipment safe.

What you gain by choosing this part

• Reliability and traceability: ABB’s XT5NU series is recognized for consistent performance, enabling predictable protection across your electrical distribution system.
• Operational efficiency: Exact-fit parts reduce installation time and misfits, helping your crew complete service work faster.
• Future-proof stocking: The explicit part number simplifies inventory management and reorder processes for ongoing maintenance needs.

Specifications at a glance

• Amperage: 400 A
• Poles: 3
• Voltage: 600 V
• Product type: Circuit Breaker
• Manufacturer: ABB
• Model family: XT5NU

If you need help matching this exact part number or confirming compatibility with your panel schedule, send us a message and we’ll help you verify the fit quickly.