Square D | PBQ3640GRA | Fusible Bus Plug | 400A | 3-Pole | 600V

Meet the Square D PBQ3640GRA Fusible Bus Plug—a purpose-built component engineered for maintenance, retrofit, and replacement within demanding electrical distribution systems. With a robust 400A rating, a 3-Pole configuration, and a 600V operating ceiling, this unit is ready to support high-current, three-phase applications while maintaining clear fault isolation and reliable protection.

• 400A current rating designed to handle substantial load in demanding environments, reducing downtime during servicing.
• 3-Pole configuration aligns with standard three-phase power architectures found in industrial and commercial settings.
• 600V maximum system voltage ensures compatibility with common high-voltage distribution needs.
• Fusible bus plug design facilitates streamlined maintenance, upgrades, and replacements without sacrificing protection or performance.
• Part number PBQ3640GRA as the exact reference for compatibility—always verify fit and ratings before ordering.
• Reliable Square D engineering backed by a legacy of dependable power distribution solutions for critical applications.

Ideal use cases include upgrading existing panels to fusible protection, performing scheduled maintenance with minimal disruption, or replacing worn bus plugs in three‑phase, 600V systems. This specifically packaged solution is chosen when exact compatibility and precise electrical ratings matter for safe, code‑compliant operation.

Practical tips for selecting and installing: verify that your panel or bus assembly requires a 400A, 3-Pole, 600V fusible bus plug of the PBQ3640GRA family. Always reference the exact part number to confirm fit and ratings, and consult your panel’s service documentation to ensure proper installation procedures and sequence. When in doubt, matching the part number to your equipment is the fastest path to reliable, compliant performance.

Specifications at a glance

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Part number: PBQ3640GRA

Choose the PBQ3640GRA for a precise, dependable fusible bus plug that aligns with your Square D equipment, delivering predictable protection and straightforward maintenance when you need it most.