The SPSTET4-xx power-shelf solutions provide rectification, system management, and power distribution, while maintaining high reliability and offering flexibility for future expansion. The power shelf can be configured with up to six hot-swap capable TET4000-48-069RA AC/DC-DC power supplies that convert 3-phase AC mains power into a main output of 54.5 VDC for powering IT racks, OCP racks and Data centers. The shelf has an optional slot for a Network Attached Controller, providing control functions and monitoring through a 10/100 MB base Ethernet port. It can be connected directly to the data center management network.