Square D PQ-4220 - 200A, 3-Phase, Fusible Bus Plug

Square D PQ-4220 is a 200A, 3-Phase Fusible Bus Plug designed to keep demanding industrial and commercial power systems running smoothly. Engineered to drop into existing busway and panelboard distributions, this plug-in device provides a secure, fuse-protected path for critical equipment and facility infrastructure.

Key advantages include compatibility with busway and panelboard distributions, a robust 200A rating, and a fusible design that supports reliable protection in retrofit projects and ongoing maintenance. This PQ-4220 bus plug is especially well-suited for industrial plants, commercial facilities, process equipment, and retrofit initiatives where dependable, hard-to-find busplugs are required to minimize downtime.

What makes this bus plug unique

• High-current 200A, 3-Phase configuration: Delivers consistent power for multi-feed loads while maintaining balance across three phases.
• Fusible protection path: Built-in fusible design provides protective coordination within your panelboard or busway network, helping prevent faults from spreading.
• Plug-in convenience for busway and panelboards: Seamlessly fits into compatible distribution architectures, simplifying upgrades and routine maintenance.
• Reliable, industry-grade construction: Square D components are designed to endure demanding electrical environments.
• Ideal for retrofit and maintenance projects: A practical solution when compatible, hard-to-find busplugs are required to complete upgrades or keep systems up to date.

Ideal use cases

Use this PQ-4220 bus plug when you need to:

• Replace aging or damaged fusible plugs in existing busway or panelboard installations.
• Upgrade power distribution for process equipment or facilities that require dependable protection and current-ready paths.
• Conduct retrofit projects in factories, warehouses, or commercial spaces where modularity and compatibility matter.
• Maintain stock for maintenance teams to minimize downtime during service windows.

Specifications at a glance

• Brand: Square D
• Model: PQ-4220
• Type: Fusible Bus Plug
• Amperage: 200A
• Phase / Poles: 3-Phase
• Application: Busway and panelboard power distribution systems

Note: This listing is intended for maintenance, repair, and upgrade projects where compatible, hard-to-find busplugs are required. Verify compatibility with your existing busway or panelboard configuration and follow all safety and installation guidelines provided by Square D.