Square D | FAF34090 | Circuit Breaker | 90A | 3-Pole | 480V

The Square D FAF34090 Circuit Breaker is a rugged, 90-amp, three-pole protective device designed for 480V three-phase systems. Built to endure demanding industrial environments, it interrupts fault currents quickly to protect wiring, motors, sensors, and downstream equipment. This unit is ideal for maintenance, retrofit, and replacement projects where exact specifications matter and downtime is minimized by a direct-fit reference.

Key specifications

• Amperage: 90 A
• Poles: 3-Pole
• Voltage rating: 480 V (AC)
• Part number: FAF34090

Where this breaker shines

Whether you’re updating an aging panel, performing a retrofit to support higher-capacity equipment, or replacing a failed device, the FAF34090 delivers dependable protection in 480V, three‑phase environments. It’s well-suited for industrial controls, HVAC systems, motor control centers, and distribution panels that run on 480V. Using the exact part number FAF34090 helps ensure compatibility with your Square D or Schneider Electric distribution gear and minimizes fitment guesswork.

Why this matters

Protection in high-voltage, high-current applications isn’t optional — it’s essential for safety, uptime, and equipment longevity. With a 90A rating, you can tailor protection to motor loads and distribution feeders common in manufacturing floors and data-center support systems, reducing the risk of nuisance trips while maintaining fast fault interruption when it counts.

Compatibility and purchasing guidance

Before ordering, confirm fit and ratings against your panel labeling and service documentation. The FAF34090 part number is the most reliable reference for compatibility with Square D panels and enclosures. If your system was configured for a 480V three‑phase supply and requires a 90A, 3‑pole breaker, this unit matches those exact specs.

Practical tips and best practices

• Verify the panel’s labeling shows a 3‑pole, 480V circuit breaker with a 90A rating and that it accepts the FAF34090 form factor.
• Schedule replacement during planned maintenance to minimize downtime; having the exact FAF34090 on hand speeds up the swap.
• Handle with power off and follow lockout/tagout procedures; keep compatibility documentation handy to confirm spec alignment.