Square D FCN-321 - 30A, 3-Phase, Fusible Bus Plug

The Square D FCN-321 Fusible Bus Plug is your dependable solution for safe, reliable power distribution in demanding industrial and commercial environments. Designed to integrate with busway and panelboard systems, this 30A, 3-phase device delivers precise protection and streamlined retrofit capability for ongoing operations and upgrades.

What sets the FCN-321 apart

• Three-phase, 30A protection ensures balanced current distribution across all legs and reliable fault isolation.
• Fusible protection provides selectable overcurrent safeguards, enhancing safety during maintenance and service windows.
• Seamless compatibility with common busway and panelboard configurations simplifies retrofits and replacements without extensive rewiring.
• Hard-to-find, OEM-aligned replacement tailored for maintenance, repair, and upgrade projects that require a compatible Square D bus plug.
• Industrial-grade reliability from Square D, a trusted name in electrical distribution for durable performance in harsh environments.

Ideal applications

Use the FCN-321 in industrial plants, commercial facilities, and process equipment installations where robust power distribution and fused protection are essential. It’s especially valuable for retrofit projects and maintenance operations that demand compatible, readily available bus plugs to keep systems online with minimal downtime.

Specifications at a glance

• Brand: Square D
• Model: FCN-321
• Type: Fusible Bus Plug
• Amperage: 30A
• Phase / Poles: 3-Phase
• Application: Busway and panelboard power distribution systems

Practical considerations for installation and use

Before integrating the FCN-321, verify compatibility with your busway and panelboard assemblies and confirm that the fuse rating aligns with your protection strategy. Plan for safe de-energization during replacements, and ensure you’re sourcing the FCN-321 model to maintain system reliability and safety standards in your electrical distribution infrastructure.

In short, the Square D FCN-321 30A 3-Phase Fusible Bus Plug offers precise, ready-to-install protection for demanding distribution networks. Its clear compatibility, reliable performance, and retrofit-friendly design help you minimize downtime while maximizing operational safety and efficiency.