Square D PQ3603 - 30A, 600V, 3-Phase, Fusible Bus Plug

Square D PQ3603 Fusible Bus Plug — a rugged, plug-in solution designed for reliable three‑phase power distribution in demanding industrial and commercial environments.

Built for integration with compatible busway and panelboard systems, the PQ3603 delivers a precise 30A, 600V rating across three phases. This fusible bus plug enables quick isolation for maintenance and targeted fault protection, helping you minimize downtime during outages, repairs, or retrofit projects.

Key advantages

• Three‑phase performance: 30A, 600V capacity ensures dependable distribution for motor drives, process equipment, and other demanding loads.
• Fusible protection: Integrated fusible design provides overcurrent protection for feeder circuits while allowing fast disconnection when service is required.
• OEM‑level reliability: Originating from Square D, built to meet institutional standards and engineered for long service life in tough environments.
• Retrofit‑friendly: Ideal for maintenance, repair, and upgrades where compatible busplugs are essential to restore or expand system capability.
• Versatile compatibility: Specifically intended for use with Square D busway and panelboard power distribution assemblies.

Ideal uses and scenarios

• Maintenance outages in industrial plants or commercial facilities requiring immediate, reliable power isolation.
• Retrofit projects where a compatible 3‑phase, 600V fusible bus plug is needed to extend or reconfigure existing distribution.
• Process equipment upgrades that demand predictable fault protection and minimal system downtime.
• New installations where Square D PQ‑series busway/panelboard components are specified for standardization and ease of service.

Technical specifications

• Brand: Square D
• Model: PQ3603
• Type: Fusible Bus Plug
• Amperage: 30A
• Voltage rating: 600V
• Phase / Poles: 3‑Phase
• Application: Busway and panelboard power distribution systems

Practical considerations

Before integrating this bus plug, confirm that your busway or panelboard assembly is designed to accept PQ3603‑style fusible plugs and that the system’s rated voltage and current align with the 600V, 30A specification. This plug‑in solution is especially valuable for facilities needing a reliable, OEM‑built component to support maintenance, upgrades, and retrofits without compromising safety or performance.