Square D PQ3620J 200A 3P 600V Safety Switch, Fusible | AmpState

Meet the Square D PQ3620J 200A 3P 600V fusible safety switch — a purpose-built solution for equipment disconnect and isolation at the point of use. Built to handle everyday electrical work, this switch delivers dependable overcurrent protection and fast, safe shutdown when maintenance or retrofit work is needed.

Key specs at a glance:

• Amperage: 200 A
• Poles: 3
• Voltage rating: 600 V
• Protection type: Fusible safety switch
• Manufacturer: Square D
• Part number: PQ3620J

This fusible safety switch is specifically designed for isolation at the point of use, making it ideal for maintenance planning and retrofit projects where keeping the same part number simplifies sourcing and reduces downtime. The 3-pole design supports typical three-phase installations, delivering reliable protection for feeders and equipment branches in industrial environments.

Why this design stands out

• Retrofit-friendly: The PQ3620J part number remains consistent across projects, easing replacement, stocking, and service planning when upgrading legacy systems.
• Clear isolation for maintenance: Provides a definite disconnect path, enabling safe, lockout-tagout procedures and minimizing risk during servicing.
• Compact, field-proven protection: Combines a robust fusible protection mechanism with straightforward operation, reducing complexity in control wiring and maintenance cycles.
• Trusted reliability: Square D safety switches are a long-standing choice for industrial safety and electrical reliability in demanding environments.
• Supported by AmpState: Available from AmpState with expert assistance to confirm fit and compatibility for your exact installation.

Ideal use cases

• Equipment disconnects in manufacturing lines, conveyors, or large motor circuits
• Retrofit projects where maintaining the same part number minimizes downtime and sourcing headache
• Maintenance windows requiring safe, verifiable isolation at the point of use
• New installations that demand robust, field-serviceable fusible protection

Installation and care tips

Install by a qualified electrical professional in accordance with local codes and standards. Ensure compatible fusing and wiring practices are followed, and establish proper lockout/tagout procedures during service. Regular inspection of the switch’s mechanical operation and fuse status will help sustain reliable protection over time.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.