ABB XT5NU325AFFF000XXX Circuit Breaker, 400A, 3-Pole

Tackle demanding industrial electrical protection with the ABB XT5NU325AFFF000XXX circuit breaker. This 400 A, 3-pole unit is built for heavy-duty service, maintenance, and replacement projects where fast, reliable fault isolation is essential.

Use the part number XT5NU325AFFF000XXX to confirm compatibility with your panel, bus configuration, and operating environment. ABB’s XT5NU line is engineered for robust performance in industrial settings, helping protect feeders and motors from overcurrent events while minimizing downtime.

Key specifications

• Manufacturer: ABB
• Part number: XT5NU325AFFF000XXX
• Product type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Applications: Industrial electrical service, maintenance, and replacement projects

Why this 3-pole XT5NU breaker stands out

• Three-pole configuration provides coordinated protection for three-phase power distribution, making it ideal for motor drives, conveyors, and other heavy machinery.
• 400 A rating supports large feeders and main circuits in industrial facilities, delivering reliable protection without frequent nuisance trips.
• Part-number-driven compatibility helps ensure you source the exact fit for your panel and application—reducing downtime and procurement risk.
• Designed for service and replacement work, enabling quick swap-ins in existing installations with minimal modification.

Use cases and installation considerations

Best suited for upgrading or replacing aging circuit protection in industrial control panels, switchgear, and large power distribution systems. When planning installation, verify:

• That the panel or switchgear accepts a 3-pole device of 400 A rating, and
• That the bus configuration and mounting arrangement match the XT5NU325AFFF000XXX specifications.

Need help confirming compatibility or matching the exact part number to your application? Message us and we’ll assist with fitment checks, documentation, and procurement guidance.