Square D FAN-321 - 30A, 240V, Fusible Bus Plug

Square D FAN-321 Fusible Bus Plug delivers dependable, targeted protection for critical power feeds in busway and panelboard architectures. With a 30A, 240V rating, this plug-in protective device is engineered to drop in where you need fast-acting fusible protection without rewiring or equipment downtime.

Smart protection for industrial and commercial distributions

Designed for demanding environments—industrial plants, commercial facilities, and process equipment—the FAN-321 is ideal for maintenance, repair, and retrofit projects where compatible, hard-to-find busplugs are required. It helps you isolate faults quickly, protecting wiring, sensors, and downstream equipment while keeping downtime to a minimum.

Key specifications

• Brand: Square D
• Model: FAN-321
• Type: Fusible Bus Plug
• Amperage: 30A
• Voltage: 240V
• Application: Busway and panelboard power distribution systems

Why choose the FAN-321 for your system

• Plug-and-protect installation: A fusible bus plug that snaps into compatible busways and panelboards, enabling fast upgrades to protective devices without swapping entire enclosures.
• Targeted protection: Integrates fusible protection at the point of use, helping to contain faults and minimize collateral damage to upstream and downstream circuits.
• Retrofit versatility: An ideal solution for retrofits and upgrades in aging facilities where spare parts are scarce and downtime matters.
• Reliability in harsh environments: Built to hold up in demanding industrial and commercial settings, delivering consistent performance across shifts and seasons.

Practical use cases

• Upgrading a legacy distribution path in a manufacturing line to add fusible protection without a full panel remodel.
• Adding protective taps to a feed between a busway run and a panelboard in a retrofit project.
• Replacing a non-fusible plug or damaged component to restore safe, code-aligned protection quickly.
• Reinforcing process equipment feeders that require reliable, field-replaceable protection modules.

What’s included

1 x Square D FAN-321 Fusible Bus Plug, designed for fast, straightforward installation into compatible busway and panelboard systems.