Infineon Technologies AG and SolarEdge Technologies Expand 800 VDC Data Centre Power Protection Collaboration

Infineon Technologies AG and SolarEdge Technologies have extended their collaboration on Solid-State Circuit Breaker (SSCB) technology for high-voltage DC distribution in AI and hyperscale data centres. The collaboration focuses on fault isolation in 800 VDC power architectures, where rapid interruption is required to isolate faults while maintaining system efficiency and selectivity.

The expanded collaboration covers solid-state protection in the distribution layer between the Solid-State Transformer (SST) and compute racks. SolarEdge is responsible for the SSCB solution design, while Infineon is providing its silicon carbide (SiC) JFET technology for the protection devices.

As rapidly increasing AI compute density drives the industry toward higher-voltage DC distribution, solid-state circuit breakers address one of the most fundamental challenges in enabling safe and reliable operation. Unlike conventional Alternating Current (AC) systems, DC protection presents a different engineering challenge. 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 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 directly on SolarEdge's SST platform 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. 

Shuki Nir, Chief Executive Officer of SolarEdge, said, "High-density AI infrastructure at 800 VDC demands uncompromising efficiency and protection. Solid-state protection will enable operators to achieve both, delivering ultra-fast and dependable fault isolation without sacrificing conversion performance. Infineon's silicon carbide technology is what makes it practical at scale."

Andreas Weisl, Executive Vice President and Chief Sales Officer of Industrial and Infrastructure at Infineon, said, "Today’s data infrastructures have become more vulnerable to electrical faults, thereby driving the demand for smarter, faster and more robust power distribution systems. By combining our advanced silicon carbide JFET technology with SolarEdge’s expertise in final power distribution, we are addressing these demands to ensure fast, safe and reliable operations in AI data centers."

Building on more than 15 years of leadership in DC-coupled power electronics, SolarEdge is developing an 800 VDC powertrain for AI factories, a DC-native chain that carries power from the medium-voltage grid connection through conversion, distribution and protection to the compute rack. Infineon's broad portfolio of silicon, silicon carbide and gallium nitride solutions provides that foundation, supporting the decarbonisation of AI infrastructure through lower losses, reduced environmental impact, and improved total cost of ownership.