Square D | PBQ4640GRA | Fusible Bus Plug | 400A | 600V

Engineered by Square D, the PBQ4640GRA Fusible Bus Plug delivers precise, reliable protection in a compact, field-ready package. Rated for 400A at 600V, this bus plug is designed for maintenance, retrofit, and replacement projects where exact specs and dependable performance matter most.

Key specifications

• Amperage: 400 A
• Voltage: 600 V
• Type: Fusible Bus Plug
• Part number: PBQ4640GRA

Why this fusible bus plug stands out

This part provides the specific rating and form factor required for compatibility with Square D equipment. Using the exact part number PBQ4640GRA helps ensure a secure fit, reliable electrical contact, and consistent protective performance, reducing the risk of mismatched components during maintenance or retrofits.

Ideal use cases

• Maintenance: Quick, swap-in protection when a bus plug reaches the end of life or shows signs of wear.
• Retrofit: Modernize existing panels with fusible protection while preserving the established wiring layout.
• Replacement: Keep a ready-to-install part on hand for faster field repairs and minimized downtime.

Compatibility and ordering notes

Confirm fit and ratings before ordering. The PBQ4640GRA part number is the best reference for compatibility with your Square D equipment, ensuring a correct match for safe, reliable operation.

Who should consider this part

Electrical maintenance teams, facility managers, and service technicians working with Square D distribution gear that requires fusible protection at up to 600V and 400A will find the PBQ4640GRA essential for dependable performance and streamlined servicing.