The N9K-C9300-FAN3-B is a Cisco fan designed for the Nexus 9300 Series Switch, providing side exhaust airflow to maintain optimal operating temperatures. This 3‑port fan module is engineered to fit seamlessly into the Nexus 9300 chassis, ensuring reliable cooling performance and efficient heat dissipation. It supports the switch’s high‑density configuration by delivering targeted airflow to the rear of the device, helping to preserve system stability and extend component life. The fan is a compatible replacement or upgrade part for the Nexus 9300, enabling continued compliance with Cisco’s performance and thermal management standards.