The N56128-FAN-B fan module is designed for Cisco Nexus 5000 Series switches, providing efficient back-to-front airflow with intake from the port side. This module supports the high‑density chassis by delivering reliable cooling performance, ensuring optimal temperature control for internal components. Its integration into the port side intake design facilitates streamlined airflow management, reducing hot spots and enhancing overall system stability. Compatible with the Nexus 5000 Series architecture, it is a critical component for maintaining operational reliability and extending hardware lifespan in data center environments.