Cisco N3K-C3048-FAN-B Nexus 3000 Front-to-Back Airflow (Port Side Intake) Fan

The Cisco N3K-C3048-FAN-B is the port-side intake (front-to-back) fan module for the Cisco Nexus 3048 switch, which NetworkTigers lists as front-to-back airflow. The tray holds redundant fans and is hot-swappable, with Cisco allowing about one minute for a swap while the switch keeps running.

The handle carries Cisco's burgundy coloring, which marks the airflow direction at a glance. Every fan module and power supply in one chassis must share the same airflow direction, so match this module with port-side intake power supplies. The reversed-direction part for the opposite cooling path is the N3K-C3048-FAN.

It cools the Nexus 3048TP-1GE.

A switch with a failed fan raises an environmental alarm in NX-OS and keeps running on its remaining fans only for a limited time, so a spare tray per row shortens the exposure. Confirm the fitted part number from the switch environment output or the colored handle before ordering, and never mix intake and exhaust modules in one chassis. The tray seats on a single connector and needs no configuration: the switch detects it on insertion and clears the alarm once fan speeds stabilize. Order the direction your row needs rather than working around a mismatched spare.

This seller refurbished fan module is tested, working, and covered by the NetworkTigers one-year warranty.