Square D | FJA34090 | Circuit Breaker | 90A | 3-Pole | 480V

Meet the Square D FJA34090 Circuit Breaker — a precise, three‑pole device rated for 90A in 480V three‑phase systems. Designed for maintenance, retrofit, and replacement projects, this breaker delivers dependable protection where exact specifications matter, helping keep industrial power flowing and equipment safeguarded.

Key specifications

• Amperage: 90A
• Poles: 3‑Pole
• Voltage: 480V
• Brand/Part: Square D FJA34090

Why choose this exact part? When your panel or downstream equipment requires a 90A, 3‑pole breaker at 480V, matching the model number FJA34090 is the most reliable way to ensure proper fit, electrical characteristics, and trip behavior. Using the correct part reduces the risk of incompatibility, nuisance tripping, or improper protection in demanding industrial environments.

Ideal use cases

• Maintenance: replace aging or failed breakers in 480V three‑phase panels that specify FJA34090
• Retrofit: upgrade or modify existing electrical installations to enforce 90A protection across all three phases
• Replacement: substitute a worn or damaged breaker with an exact, spec‑matched model to preserve system performance

Compatibility and installation notes

• Confirm fit and ratings before ordering. The part number FJA34090 is your best reference for compatibility with Square D panels and assemblies.
• Cross‑check panel labeling and service requirements to ensure the 90A, 3‑pole, 480V configuration matches your system’s protections and downstream devices.

In practical terms, this 90A, 3‑pole, 480V Square D circuit breaker provides robust, three‑phase protection for industrial equipment, drives, and distribution panels. It’s the right choice when you need a reliable, spec‑accurate replacement that aligns with your existing electrical architecture, minimizes downtime, and preserves consistent protection across all three phases.