Square D | FA340201021 | Circuit Breaker | 20A | 3-Pole | 480V | 18kA | Plug-In

Introducing the Square D FA340201021 circuit breaker—a precision-engineered, plug‑in protection device designed for demanding industrial panels. With a 20A rating across three poles operating at 480V and an 18kA interrupt capacity, this unit is built to stop faults quickly while minimizing downtime during maintenance, retrofit, or replacement projects.

Key specifications

• Amperage: 20A
• Poles: 3-Pole
• Voltage: 480V
• Interrupt capacity: 18kA
• Type: Plug-In
• Part number: FA340201021
• Brand: Square D

Why this FA340201021 is a smart choice

• Plug-in design enables rapid panel swaps, reducing downtime when performing maintenance or retrofits.
• 480V three‑phase compatibility aligns with common industrial power distributions, simplifying selection for new projects or upgrades.
• Three-pole configuration provides coordinated protection for multi‑phase circuits, improving overall system safety.
• 18kA interrupt rating offers robust fault current handling, enhancing protection for connected equipment and reducing arc energy concerns.

Ideal use cases

• Maintenance or replacement in existing electrical panels that require exact 20A, 3‑pole, 480V protection.
• Retrofit projects where upgrading to a higher current or newer plug‑in design is part of a safety or efficiency plan.
• Replacement part stocking for service teams responsible for critical, three‑phase industrial lines.

Compatibility and installation tips

Always confirm fit and ratings before ordering. The FA340201021 part number is the best reference for compatibility with your panel. Ensure your system is rated for 480V and that the installation matches a three-phase configuration to honor the 3‑pole design. When installing, follow standard safety procedures, verify proper seating in the plug‑in mount, and test functionality to confirm reliable tripping behavior.

Whether you’re stocking up for routine maintenance, undertaking a retrofit, or replacing a worn unit, this Square D FA340201021 circuit breaker delivers dependable, industry‑standard protection for your 480V, three‑phase systems.