ABB XT5LU340ABYN000XXX 400A 3P 600V Circuit Breaker | AmpState

Designed for everyday electrical work, the ABB XT5LU340ABYN000XXX is a robust 400 A, 3-pole circuit breaker built to safeguard panelboards, load centers, and distributed electrical systems. It delivers reliable overcurrent protection where heavy-duty performance is essential, helping maintain uptime in commercial, industrial, and residential applications.

Why this ABB model stands out

• High-capacity protection: 400 A rating handles demanding circuits with confidence, reducing nuisance trips on large electrical loads.
• Three-pole design: Comprehensive 3P protection ensures balanced switching and coordinated breaking for multi-phase systems.
• 600 V application: Suitable for standard distribution environments, offering dependable performance across common industrial and commercial feeders.
• Original-part compatibility: Specifically chosen to align with the original BOM, making it a reliable replacement option that preserves electrical architecture.
• Stock-ready for maintenance: Ideal as a spare to minimize downtime and keep critical circuits protected during service windows.

Key specifications

• Manufacturer: ABB
• Part number: XT5LU340ABYN000XXX
• Product type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V

Ideal use cases

• Replacement projects in existing panelboards where the original part number must be preserved for BOM accuracy.
• Load center upgrades and electrical distribution rewiring that demand reliable, high-capacity overcurrent protection.
• Stock spares for facilities with critical or high-load circuits, ensuring rapid replacements to minimize downtime.
• New installations in systems that require a three-pole, 600 V breaker with substantial amperage handling.

How it helps you compare and decide

• Compared to smaller or lower-current breakers, this model supports larger feeders and reduces the risk of nuisance faults on heavy circuits.
• Its alignment with the original BOM makes procurement and maintenance simpler, especially in multi-site operations where consistency matters.
• As a genuine ABB component, it’s designed for predictable performance, long service life, and compatibility with standard distribution gear.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit. Available from AmpState.