ABB XT5LU340AFFF000XXX Circuit Breaker, 400A, 3-Pole, 600V

The ABB XT5LU340AFFF000XXX circuit breaker is built for rugged industrial electrical service, delivering reliable protection for demanding 3‑phase power systems. With a robust 400 A rating and a 600 V capability, it’s designed to handle high-load environments found in manufacturing, processing, and large facility operations.

Key specifications at a glance

• Amperage: 400 A
• Poles: 3 (three‑pole) for 3‑phase circuits
• Voltage rating: 600 V
• Part number: XT5LU340AFFF000XXX
• Applications: industrial service, maintenance, and replacement projects

Why this ABB model stands out is its focused purpose for high‑demand environments. The three‑pole design protects all conductors in a 3‑phase system, ensuring balanced protection across phases and reducing the risk of uneven loading. This makes it an ideal choice when upgrading or replacing aging breakers in panelboards, switchgear, or distribution assemblies that run heavy machinery, conveyors, pumps, and other industrial equipment.

Practical use cases include:

• Replacing worn or obsolete breakers in an industrial control panel or main distribution panel.
• Upgrading to a higher capacity for lines feeding heavy loads or equipment with significant starting currents.
• Stocking a reliable spare for planned maintenance to minimize downtime.
• Integrating into 600 V distribution systems that require dependable, three‑phase protection.

Compatibility and verification

Note: Verify fit by part number and application requirements. If you’re unsure about compatibility, our team can help you confirm fitment and suitability for your exact panel, wiring configuration, and system protection needs. Message us for expert guidance on matching this part number to your application.