Lenovo 7XH7A05900 Thinksystem ST550 Rear FAN Module for Redundant FAN

Lenovo 7XH7A05900 ThinkSystem ST550 Rear Fan Module for Redundant Cooling

Overview

The Lenovo 7XH7A05900 is a rear fan module designed to restore or establish redundant fan coverage in the ThinkSystem ST550 tower server. In ST550 deployments configured for fault-tolerant airflow — where a failed or missing rear module would collapse the redundant cooling path and trigger thermal throttling — this part returns the chassis to a fully redundant state without a service interruption requiring full system replacement. At 1.40 lb and 11.00 x 7.50 x 5.00 in, the 7XH7A05900 is sized to the ST550's rear fan bay and installs as a direct field-replacement unit.

Compatibility

This module is designed for the Lenovo ThinkSystem ST550 tower server. It is specific to the ST550's rear fan bay and is not a universal Lenovo fan module — verify your ST550's existing fan configuration before ordering to confirm the rear module slot is the correct target. It is not confirmed compatible with other ThinkSystem tower models such as the ST250 or ST650.

Installation Notes

The 7XH7A05900 slots into the rear fan bay of the ST550 tower chassis. No tools are specified in available documentation. As with all server fan replacements, follow Lenovo's guidance on hot-swap vs. cold-swap procedure for your specific firmware revision — confirm whether the ST550's redundant fan configuration supports live insertion before pulling the existing failed module under load. Country of origin is Mexico.