IN Brief:
- Infineon will supply silicon carbide power devices for Eaton's MVSST 2.0 medium-voltage solid-state transformer platform.
- The system targets emerging 800VDC AI data centre distribution while reducing conversion stages compared with conventional architectures.
- Eaton and Infineon are exploring future platforms based on 2.3kV and 3.3kV silicon carbide modules.
Infineon Technologies will supply silicon carbide power devices for Eaton’s MVSST 2.0 medium-voltage solid-state transformer platform, giving the semiconductor manufacturer a defined equipment role in an 800VDC data centre architecture rather than another conceptual partnership around high-density computing power.
Eaton’s platform is designed for deployment across the Asia-Pacific region and targets emerging 800VDC power distribution in AI data centres. Infineon says the solid-state transformer reduces the number of conversion stages compared with conventional architectures, with the aim of improving efficiency, power density, scalability, and deployment flexibility between the medium-voltage grid connection and downstream computing loads.
Silicon carbide devices provide the switching layer that makes higher-frequency solid-state conversion practical at these power levels. Compared with conventional silicon, SiC can operate at higher electric fields, switching frequencies, and temperatures, allowing designers to reduce the size of some passive and magnetic components while keeping conversion losses under control. The final performance still depends on the complete converter, cooling, control, and protection design.
The MVSST 2.0 is described by Infineon as one of the first medium-voltage solid-state transformer platforms to achieve IEC certification. That claim matters because data centre operators are unlikely to adopt a radically different power architecture on semiconductor performance alone. Equipment also has to fit established requirements for electrical safety, fault response, availability, maintainability, and integration with the rest of the site’s distribution system.
The Eaton collaboration is distinct from Infineon’s other recent 800VDC announcements. Earlier in September, the company extended its work with SolarEdge into solid-state circuit breakers designed to interrupt DC faults much faster than electromechanical devices. It has also signed a memorandum with Skeleton Technologies covering solid-state transformers and high-power sidecar systems for AI infrastructure.
Those projects sit at different points in the same emerging power chain. The SolarEdge work is focused on fault interruption, while the Skeleton collaboration covers a broader resilience architecture. Eaton’s MVSST 2.0 is a specific transformer platform in which Infineon’s SiC devices are intended to perform the medium-voltage conversion itself.
The engineering case for 800VDC becomes stronger as rack power rises. Higher distribution voltage reduces current for a given power level, cutting conductor size and resistive losses compared with lower-voltage DC distribution. The rack still requires conversion to the much lower voltages used by processors and accelerators, but moving more of the upstream path to higher-voltage DC can reduce the number and scale of intermediate conversion stages.
That concentration of functionality also changes failure management. Conventional data centre electrical systems distribute transformation, rectification, UPS, protection, and switching across separate pieces of equipment. A solid-state transformer can combine some of those functions into a more compact power electronics platform, but the resulting system has to demonstrate how module failures, cooling faults, control errors, and abnormal grid conditions are isolated without creating a larger single point of failure.
Thermal management is particularly important. High switching frequency can shrink components, but power electronics still dissipate heat continuously under heavy loading. AI facilities increasingly operate close to designed electrical limits for long periods, so converter efficiency and cooling performance affect not only energy consumption but also the amount of infrastructure needed to remove heat from the electrical plant itself.
Eaton and Infineon are already looking beyond the devices used in the current platform. The companies say they are exploring future solid-state transformer designs based on 2.3kV and 3.3kV silicon carbide power modules. Higher-voltage devices can reduce the number of semiconductor elements that have to be connected in series for medium-voltage conversion, although packaging, insulation coordination, switching behaviour, and fault management become correspondingly more demanding.
Commercial adoption will depend on more than efficiency claims. Data centre operators will compare solid-state transformers with conventional transformers and UPS architectures across capital cost, footprint, energy losses, replacement strategy, maintenance skills, spare parts, certification, and expected life. Mature magnetic transformers are bulky but well understood; a solid-state alternative has to justify greater electronic complexity with operational advantages that persist for years rather than only at commissioning.
That is where Eaton’s role changes the significance of the announcement. The company already supplies established power distribution equipment into data centres, so MVSST 2.0 places solid-state conversion closer to conventional electrical procurement and service channels. Infineon’s contribution is narrower but essential: the SiC devices have to provide the efficiency and switching performance on which the platform’s power density depends.
The next step is therefore less about proving that 800VDC can be drawn on a reference architecture and more about proving that certified medium-voltage equipment can operate reliably at scale. If MVSST 2.0 performs as intended in deployed AI facilities, the partnership will provide a clearer test of whether solid-state transformers can move from development programmes into normal data centre power infrastructure.
