The FAN-0074L4 is a Supermicro 80‑mm middle axial fan engineered for hot‑swappable installation in 4U chassis. Designed to fit the Supermicro CSE‑743 and CSE‑745TS series, this fan provides reliable airflow for server environments that require modular cooling solutions. Its mid‑axial design allows it to be mounted in the middle of the chassis, ensuring efficient heat removal from key components. The hot‑swappable feature enables maintenance or replacement without powering down the system, minimizing downtime. This fan is a suitable choice for data‑center or enterprise applications that demand dependable cooling in a compact form factor.