Cisco WS-C5518 enterprise networking (router/Catalyst switch/UCS families) Datacentre Switch

The Cisco WS-C5518 is a genuine Cisco AC power supply (spare part 34-0870-01) for the Catalyst 5509 chassis, rated at up to 1200W depending on the specific build revision. It is one of the field-replaceable power supplies Cisco offered across the Catalyst 5000/5500 Series modular chassis, and a failed or ageing PSU is one of the most routine reasons an otherwise-serviceable 5509 needs a component swap. The 5509 was the largest fixed chassis size in the original Catalyst 5000 family, commonly used as a campus core or aggregation switch, so keeping its power supplies serviceable is a standard part of maintaining older 5000-series deployments still in production. Confirm your chassis’ power requirements and any redundant-supply configuration before ordering. This is a refurbished unit, shipped worldwide from Tech-Star’s UK stock, and Tech-Star’s team can help confirm fit against your exact chassis build.