Square D PQ3240 - 400A, 240V, 3-Phase, Fusible Bus Plug

Power distribution reliability meets industrial-grade design with the Square D PQ3240 Fusible Bus Plug. Engineered for demanding industrial and commercial environments, this 400A, 240V, 3-phase bus plug is built to keep critical equipment powered and protected, even in challenging operating conditions.

Designed for seamless integration into busway and panelboard power distribution systems, the PQ3240 delivers fast, secure connections and dependable overload protection. Its fusible configuration provides targeted protection where you need it, helping to minimize downtime and collateral damage during faults. This makes it an ideal choice for retrofit projects, maintenance, and upgrades where compatible, hard-to-find busplugs are required.

Distinctive value you’ll notice

• High-capacity performance: 400A carry capacity supports heavy equipment and multi‑section distributions without compromising protection.
• Precise 3-phase, 240V operation: Aligns with standard industrial power networks for reliable, balanced power delivery across loads.
• Fusible protection: Provides selective fault interruption to protect downstream devices and reduce risk of widespread outages.
• Direct fit for Square D systems: Optimized compatibility with busway and panelboard architectures for straightforward installation and reduced downtime.
• Maintenance-ready: A practical solution for upgrades and spare parts inventories in facilities maintenance programs.

Key specifications

• Brand: Square D
• Model: PQ3240
• Type: Fusible Bus Plug
• Amperage: 400A
• Voltage Rating: 240V
• Phase / Poles: 3-Phase

Ideal use scenarios

• Industrial plants needing dependable power distribution for process equipment and heavy loads.
• Commercial facilities performing busway or panelboard upgrades to expand capacity or improve protection.
• Retrofit projects where compatible, hard-to-find busplugs are essential to maintain system integrity.
• Maintenance and repair initiatives that require ready-to-install, compatible bus plugs to minimize downtime.

What makes this PQ3240 stand out

Rather than a generic replacement, the PQ3240 is a purpose-built solution from Square D designed to slot into established power distribution schemes with minimal fuss. Its combination of high amperage, 3-phase 240V operation, and fusible protection delivers not just power, but a targeted safeguard that helps keep facilities running smoothly, efficiently, and safely.