The Sun 541-2112-04 is a fan power board assembly designed for Sun SPARC Enterprise X4150 and X4170 1U rackmount servers. This board manages cooling system distribution and power delivery to multiple server-mounted fans, ensuring consistent thermal management across the chassis. Compatible with both X4150 and X4170 systems, the board interfaces with the server's main power distribution and control circuitry to regulate fan speed and monitor cooling status. Typical applications include data center server deployments where reliable thermal management is essential for continuous uptime. This refurbished unit has been tested and is guaranteed to meet OEM specifications; available via quote from G5 Network Group.