Infineon and SolarEdge extend collaboration
Infineon and SolarEdge Technologies have extended of their collaboration to advance solid-state circuit breaker (SSCB) technology for high-voltage DC distribution in AI and hyperscale data centres.
The collaboration addresses a key challenge in the adoption of 800 VDC architecture: Safe operation of increasingly power-dense infrastructure requires a very fast fault-isolation to achieve selectivity while maintaining high efficiency.
The compannies says that the aims is to address a critical gap in the distribution layer between the solid-state transformer (SST) and the compute rack, in order to develop a grid-to-rack solution. SolarEdge is leading the design of the SSCB solution, with Infineon providing its SiC JFET technology at the core of the protection devices.
DC protection presents different engineering challenges to AC designs. Without a natural current zero, mechanical interruption faces challenges with arcing. It is comparatively slow, and as such requires a different approach to circuit protection than conventional AC systems.
Solid-state circuit breakers are designed to interrupt faults within a few microseconds, with no mechanical contacts to separate, while Infineon's CoolSiC JFET devices are claimed to deliver efficient operation and superior robustness. Together, these capabilities help protect high-value compute equipment and enable more compact, higher-density DC distribution designs.
The collaboration builds on SolarEdge's SST platform (pictured above) with Infineon SiC components, first announced in November 2025. The SST is designed to enable direct medium-voltage (13.8-34.5 kV) to 800-1500 VDC conversion at over 99 percent efficiency, collapsing multiple conversion stages into a single solution while reducing physical footprint.
