550W Server Power Supply for R430 — D550E-S1 (dps-550ab / x185v)

Replacement power supply for R430 servers with a 550W output. Identified by model D550E-S1 and alternate part numbers dps-550ab and x185v. Exact-match unit for systems that require a 550W PSU and these model references to ensure compatibility with the R430 chassis.