Overview of the Strategic Collaboration

Infineon Technologies and SolarEdge Technologies have announced a significant extension of their collaboration to advance solid-state circuit breaker (SSCB) technology. This partnership is specifically targeted at high-voltage DC distribution within AI and hyperscale data centers. As the industry rapidly shifts toward 800 VDC architectures to support increasing AI compute density, safe operation and rapid fault isolation have become paramount. SolarEdge is leading the design of the SSCB solution, while Infineon provides its silicon carbide (SiC) JFET technology, forming the core of these advanced protection devices.

Technical Mechanics of Solid-State Circuit Breakers

The transition to DC distribution introduces distinct engineering challenges compared to conventional alternating current (AC) systems. In DC circuits, the absence of a natural current zero complicates mechanical interruption, often leading to arcing issues and comparatively slow response times. Solid-state circuit breakers resolve this by interrupting faults within a few microseconds without relying on mechanical contacts to separate. At the heart of this rapid response is Infineon’s CoolSiC JFET technology, which delivers highly efficient operation and superior robustness. This microsecond-level fault isolation ensures selectivity and maintains high efficiency, protecting high-value compute equipment while enabling more compact, higher-density DC distribution designs.

Integration with Solid-State Transformer Platforms

This latest development builds directly upon the solid-state transformer (SST) platform collaboration first announced in November 2025. The SST is engineered to enable direct medium-voltage (13.8-34.5 kV) to 800-1500 VDC conversion, achieving over 99 percent efficiency. By collapsing multiple conversion stages into a single solution, the SST significantly reduces the physical footprint of the power infrastructure. Extending the collaboration to solid-state protection addresses a critical gap in the distribution layer between the SST and the compute rack, advancing a comprehensive grid-to-rack solution. Shuki Nir, CEO of SolarEdge, emphasized that solid-state protection enables operators to achieve uncompromising efficiency and dependable fault isolation without sacrificing conversion performance.

Addressing the 800 VDC Architecture Challenge

The push for 800 VDC architecture is driven by the need to handle increasingly power-dense infrastructure safely. As Andreas Weisl, Executive Vice President and Chief Sales Officer of Industrial & Infrastructure at Infineon, noted, modern data infrastructures are more vulnerable to electrical faults. This vulnerability drives the demand for smarter, faster, and more robust power distribution systems. The collaboration specifically targets the distribution layer, ensuring that the high-voltage DC environment operates safely. By combining Infineon's advanced SiC JFET technology with SolarEdge’s expertise in final power distribution, the partnership ensures fast, safe, and reliable operations tailored for the rigorous demands of AI data centers.

Implications for AI Data Center Infrastructure

The deployment of SSCBs has profound implications for the physical and operational design of AI data centers. High-density AI infrastructure at 800 VDC demands uncompromising efficiency and protection. The core benefits of this technology include:

  • Microsecond fault interruption without mechanical wear, enabling significantly more compact power distribution designs.
  • Enhanced safety and selectivity in high-voltage DC environments, protecting high-value compute equipment.
  • Reduced downtime risks, ensuring continuous, uninterrupted processing capabilities for massive AI workloads.

This is critical for hyperscale data centers where physical footprint and cooling efficiencies are directly tied to operational costs and compute output.

Future Outlook and Industry Impact

Looking ahead, SolarEdge is leveraging its more than 15 years of leadership in DC-coupled power electronics to develop an 800 VDC powertrain specifically for AI factories. This DC-native chain is designed to carry power seamlessly from the medium-voltage grid connection through conversion, distribution, and protection directly to the compute rack. Infineon’s broad portfolio of silicon, silicon carbide, and gallium nitride solutions provides the foundational semiconductor components for this ecosystem. Ultimately, this comprehensive approach supports the broader decarbonization of AI infrastructure. By achieving lower power losses, reducing environmental impact, and improving the total cost of ownership, this collaboration sets a new standard for sustainable, high-performance data center power architectures.