IBM 42R7854 server / storage / networking hardware Server Hardware / Parts

The IBM 42R7854 is a 1050W AC hot-swappable power supply (also carried under the cross-reference part numbers 39J5638 and ECD14090001) used across IBM’s pSeries and iSeries p550-class server range, closely related to the 1475W-rated 42R8401 but built to a lower wattage rating for less power-hungry configurations of the same platform family. As with the 1475W unit, it is designed for redundant, hot-swappable installation so that a failed supply can be replaced without taking the host system offline, and power supplies of this generation are among the most frequently replaced FRUs on long-serving systems. A genuine unit restores full power redundancy after a failure is identified on a p550-class host. Specifiers should confirm their specific chassis and existing power-supply wattage rating before ordering, since the 1050W and 1475W variants are not universally interchangeable across every configuration of this platform. Tech-Star (UK-based, shipped worldwide) stocks IBM power supplies to support ongoing server maintenance projects.