SolarEdge Technologies and Infineon Technologies have expanded their partnership to advance solid-state circuit breaker (SSCB) technology. The move supports high-voltage DC distribution in AI and hyperscale data centers. Consequently, the companies aim to solve a major hurdle in adopting 800 VDC architecture. As data centers scale rapidly, safe and fast fault isolation becomes essential. Therefore, this solid-state circuit breaker technology promises to protect power-dense infrastructure while maintaining high efficiency.
Closing the Gap Between Transformer and Rack
This extended collaboration closes a critical gap in the distribution layer. It connects the solid-state transformer (SST) with the computer rack. Furthermore, it advances a complete grid-to-rack power solution. SolarEdge leads the design of its SSCB solution. Meanwhile, Infineon supplies its silicon carbide (SiC) JFET technology. This technology forms the core of the protection devices. Additionally, rising AI compute density is pushing the industry toward higher-voltage DC systems. As a result, solid-state circuit breakers address one of the most fundamental safety challenges in this shift.
Unlike traditional AC systems, DC protection creates a different engineering challenge. Without a natural current zero, mechanical breakers struggle with arcing. Moreover, these systems react comparatively slowly. Hence, they need a different protection approach than AC systems. SSCBs, however, interrupt faults within microseconds. They contain no mechanical contacts to separate. Meanwhile, Infineon’s CoolSiC™ JFET devices deliver efficient, robust performance. Together, these technologies help protect high-value compute equipment and enable more compact, higher-density DC distribution designs.
Building on the SST Platform
This partnership builds directly on SolarEdge’s SST platform. That platform uses Infineon SiC components and was first launched in November 2025. It enables direct medium-voltage conversion, ranging from 13.8 to 34.5 kV. The output reaches 800 to 1500 VDC at over 99% efficiency. Consequently, it collapses multiple conversion stages into one solution. This design also reduces the physical footprint significantly.
“High-density AI infrastructure at 800 VDC demands uncompromising efficiency and protection,” said Shuki Nir, Chief Executive Officer of SolarEdge. “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.”
“Today’s data infrastructures have become more vulnerable to electrical faults, thereby driving the demand for smarter, faster and more robust power distribution systems,” said Andreas Weisl, Executive Vice President and Chief Sales Officer of Industrial & Infrastructure at Infineon. “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.”
A Foundation for AI Infrastructure Decarbonization
Overall, SolarEdge continues building on more than 20 years of DC-coupled power electronics leadership. The company is developing an 800 VDC powertrain for AI factories. This DC-native chain carries power from the medium-voltage grid connection through conversion, distribution, and protection to the compute rack. Meanwhile, Infineon’s broad silicon, silicon carbide, and gallium nitride portfolio supports this foundation. As a result, the partnership backs AI infrastructure decarbonization through lower losses, reduced environmental impact, and improved total cost of ownership.
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News Source: Businesswire.com
