Square D PQ3620 - 200A, 600V, 3-Phase, Fusible Bus Plug

The Square D PQ3620 Fusible Bus Plug is a purpose-built solution for dependable power distribution in challenging industrial and commercial environments. With a 200 A rating and a 600 V maximum, this three‑phase bus plug delivers targeted overcurrent protection exactly where you need it, simplifying complex electrical feeds and reducing downtime during maintenance or upgrades.

Key specifications at a glance

• Brand: Square D
• Model: PQ3620
• Type: Fusible Bus Plug
• Amperage: 200 A
• Voltage Rating: 600 V
• Phase / Poles: 3‑Phase
• Application: Busway and panelboard power distribution systems
• Typical Use: Industrial plants, commercial facilities, process equipment, retrofit projects

Why this fusible bus plug stands out

• Integrates fusible protection directly into your busway or panelboard distributions, helping to isolate faults quickly and minimize collateral damage.
• 3‑phase, 200 A rating is ideal for feeders that require robust protection without over‑sizing the protection device.
• Built to hold up in demanding environments common to plants and process lines, where steady power is essential.
• Designed for use in compatible busway and panelboard systems, and specifically aligned with applications that demand hard‑to‑find, reliable busplugs for upgrades and retrofits.
• Facilitates retrofit projects by providing a ready‑to‑install fusible connection, helping you modernize protection without rewiring or extensive downtime.

Ideal use scenarios

• Upgrading aging electrical distributions in manufacturing facilities where space is at a premium and protection must be precisely targeted.
• RETROFIT projects that require a compatible, hard‑to‑find busplug to match existing Square D or compatible busway/panelboard configurations.
• Feeder sections for process equipment that demand reliable overload protection in a three‑phase, high‑load environment.
• Maintenance workflows where quick replacement of protective components minimizes plant downtime and keeps critical lines live with minimal disruption.

Practical guidance for optimal results

• Verify compatibility with your busway or panelboard system to ensure seamless integration and protection coordination with upstream protective devices.
• Plan protection coordination using the 200 A rating to match feeder loads and proposed fault current levels, helping reduce nuisance tripping and improve reliability.
• Keep spares on hand as part of routine maintenance or upgrade cycles to support rapid replacement during outages or schedule downtime.
• Use this bus plug as part of a broader protection strategy that aligns with your facility’s safety standards and electrical design guidelines.

For facilities seeking precise, dependable protection in 3‑phase power distributions, the Square D PQ3620 Fusible Bus Plug delivers a targeted, durable solution that supports efficient maintenance, seamless upgrades, and steady operations across industrial and commercial applications.