The 540-4434 Sun Fan Tray Assembly is a replacement component designed for Sun E220R and E420R servers, providing a complete cooling solution that includes three 120 mm fans mounted within a single tray. Engineered to match the original equipment specifications, this assembly ensures reliable airflow across critical system components, helping maintain optimal operating temperatures and system stability. The integrated design simplifies installation by consolidating the fans and mounting hardware into one unit, reducing downtime during service or upgrade procedures. Compatibility with both the E220R and E420R models makes it a versatile spare part for data‑center environments.