Square D FA340901037 - 90 A, 480 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D FA340901037 is a 90A, 480V, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Engineered for fast installs and straightforward replacements, it keeps your electrical systems safe with precise, repeatable protection performance.

• Fast plug-in connection enables quick installation and effortless replacement, reducing downtime during servicing or upgrades.
• Thermal-magnetic trip unit provides stable overload protection with rapid, coordinated response to short circuits, delivering consistent protection over time.
• OEM-compatible design ensures reliable fit and operation with matching Square D load centers and panelboards, preserving system integrity and listing.
• Versatile for multiple settings suitable for residential, commercial, and light industrial applications where 3-pole 480V protection is required.

Technical snapshot

• Manufacturer: Square D
• Part Number: FA340901037
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 90A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why it matters: In commercial and light industrial environments, protecting expensive equipment and ensuring continuity hinges on reliable, fast-acting breakers. The 3-pole configuration supports balanced three-phase distribution for 480V systems, delivering coordinated trips across all phases when anomalies occur. This minimizes damage, reduces downtime, and enhances overall safety.

Practical guidance: Use only with compatible Square D load centers and panelboards to maintain proper compatibility and safety certifications. When replacing, follow standard electrical safety practices, verify system power is isolated, and confirm the panel’s compatibility with plug-in molded case breakers before installation. For ongoing protection, pair this breaker with appropriately rated feeders and conduct regular inspections of panel hardware.