Server Rack PDU: Power Distribution Units are used to manage and source power for all data servers used in server racks. These units are available in different styles, power, and size. Server rack PDUs will range in power from standard 15amp up to 50-60amps. Depending on the size project you are working on, you will require a power to your rack. Shop with Global 1 Resources for all your PDU and rackmounting needs.