Square D FI36020 - 20 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D FI36020 — a 20A, 600V, 3-pole plug-in molded case circuit breaker designed to protect branch circuits in panelboards and loadcenters. Built for dependable protection and straightforward maintenance, this unit is an essential choice for residential, commercial, and light industrial electrical systems.

Fast, plug-in installation — The FI36020 features a quick plug-in connection that snaps into compatible OEM loadcenters and panelboards, enabling rapid installation and easy replacements with minimal field-wiring disruption.

Thermal-magnetic protection you can trust — The integrated trip mechanism provides stable, repeatable protection against overloads and short circuits, reducing nuisance trips while delivering fast response to faults.

• Three-pole design for 3-phase systems — Disconnects all three hot conductors in a 3-phase setup, delivering coordinated protection for motors and other multi-wire loads.
• 600V rating, 20A capacity — Suitable for a wide range of commercial and light industrial circuits, while remaining applicable for standard residential panel configurations where appropriate.
• Plug-in molded case construction — Durable, vibration-tolerant design built to withstand the demands of service panels and installation environments.
• OEM-compatible — Engineered to work with matching Square D OEM loadcenters and panelboards to ensure proper fit, trip characteristics, and electrical clearance.

Ideal use cases — Use the FI36020 for branch-circuit protection in panelboards and loadcenters when adding or replacing a 3-phase circuit, protecting equipment like motors, HVAC, and light industrial loads. It’s also a practical upgrade option when expanding panel capacity while maintaining reliable protection.

Why it matters — With a dedicated plug-in solution and precise thermal-magnetic trip behavior, technicians can plan maintenance with predictable trips, minimize downtime, and shield sensitive equipment from overheating or fault current damage.

Specification quick reference

• Manufacturer: Square D
• Part number: FI36020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 20A
• Voltage: 600V
• Poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Choose the FI36020 for a trusted, durable protection solution that aligns with your Square D OEM panelboards and configurations, ensuring safe operation and streamlined maintenance across your electrical infrastructure.