Siemens and Reinhausen develop 800 VDC solid-state transformer for AI racks

Siemens and Reinhausen have teamed up to build a solid-state transformer capable of taking medium-voltage AC up to 36 kV and delivering a clean 800 VDC output directly to AI-focused server racks. This approach follows industry leaders such as Nvidia, which advocate 800 VDC distribution to support racks that may draw up to 1 MW. By removing several intermediate conversion steps, the SST promises higher efficiency, galvanic isolation and a reduced physical footprint.

Wilfried Breuer of Reinhausen emphasized that the technology helps AI datacenters handle abrupt power spikes without compromising performance or causing outages. Stephan May, Siemens’ CEO of Electrification and Automation, said the collaboration strengthens their position in datacenter power solutions. While the partners plan to industrialise the design, they have not announced a launch timeline, and other firms like Infineon are also promoting 800 VDC components.