Square D FAN421 - 30A, 240V, Fusible Bus Plug

Square D FAN421 Fusible Bus Plug delivers a precise, reliable solution for power distribution in demanding industrial and commercial environments. Rated at 30A and 240V, this fusible bus plug is engineered to integrate seamlessly with busway and panelboard systems, ensuring fast protection and dependable operation where it matters most.

Designed for maintenance, repair, and upgrade projects, the FAN421 is the exact compatibility choice you need when replacing hard-to-find bus plugs. It keeps critical processes online and simplifies retrofits in facilities that rely on steady, safe electrical distribution—from manufacturing floors to process equipment rooms and modernized commercial spaces.

Key Specifications

• Brand: Square D
• Model: FAN421
• Type: Fusible Bus Plug
• Amperage: 30A
• Voltage Rating: 240V
• Applications: Busway and panelboard power distribution systems

Ideal Use Scenarios

• Retrofit projects in industrial plants where exact FAN421 compatibility is required to restore or upgrade distribution.
• Commercial facilities seeking to enhance reliability in feeder circuits and main distribution paths.
• Power feeds for process equipment that demand dependable fusible protection and straightforward maintenance access.
• Maintenance and replacement tasks that benefit from sourcing a recognized, hard-to-find bus plug model.

What Makes the FAN421 Stand Out

• Exact 30A, 240V fusible design tailored for Square D busways and panelboards, enabling quick, low-downtime replacements.
• Compact, plug-in form factor that streamlines installation and facilitates routine maintenance without major system disruption.
• Fusible protection that allows fast fault isolation, helping to minimize impact on surrounding circuits and equipment.
• Reliable, time-tested architecture for long-term availability in spare parts inventories and ongoing modernization efforts.

Installation & Compatibility Considerations

• Confirm that your busway or panelboard supports 30A, 240V fusible bus plugs and the FAN421 designation before installation.
• Plan for proper fuse replacement parts and follow established safety procedures during servicing and replacements.
• Verify alignment with your distribution scheme and conductor sizing to maintain optimal protection and performance.
• Adhere to local electrical codes and manufacturer guidelines to ensure compliant, safe operation.