Square D | FA340901021 | Circuit Breaker | 3-Pole | Plug-In

Meet the Square D FA340901021—a 3-pole plug-in circuit breaker crafted for dependable protection of three-phase electrical systems. Designed for maintenance, retrofit, and replacement, this unit is built to align with your panel’s exact specifications when you rely on the FA340901021 part number as the compatibility reference.

Why this breaker stands out:

• Three-pole (3‑phase) design tailored for three-phase distribution, delivering balanced protection across all conductors.
• Plug‑in installation enables quick, field-friendly replacements in compatible Square D panels, reducing downtime during service or upgrades.
• Part number accuracy FA340901021 is the definitive reference for compatibility—useful for cross‑checking panels, catalogs, and spare inventories.
• Versatile use cases ideal for panel maintenance, retrofit projects, and stocking reliable spares to minimize disruption when components need replacement.

Use cases and practical scenarios

In industrial facilities, commercial electrical rooms, or equipment rooms, this 3-pole plug-in breaker protects three-phase motors, conveyors, and other three-phase loads. When upgrading or replacing aging protection, using the exact FA340901021 part ensures proper fit and reliable tripping behavior, helping maintain safety and uptime without the guesswork of aftermarket substitutions.

How to verify compatibility

• Cross-reference the part number FA340901021 with your panel catalog to confirm plug-in suitability.
• Compare required electrical ratings (current rating, voltage, and interrupting capacity) to your system’s specifications before ordering.
• Ensure your panel accepts plug-in 3-pole breakers of Square D design to guarantee a proper mechanical fit and electrical performance.

Specs at a glance

• Poles: 3-Pole
• Mounting: Plug-In
• Part number: FA340901021
• Brand: Square D