Renesas Expands GaN Portfolio with First Low-Voltage GaN FETs for AI Data Centers and Robotics - ELE Times

Renesas's push into low-voltage GaN FETs signals a structural inflection: GaN is transitioning from niche substitution to architecture-level disruption. As AI data-center rack power crosses 30 kW, the 48 V bus forces switching frequencies above 500 kHz, where silicon MOSFETs hit a physical loss ceiling. GaN's 30-40% efficiency edge at these frequencies is no longer an optimization—it becomes a thermal-design mandate, compelling PSU vendors to redesign topologies and making MOCVD epitaxy the new supply bottleneck. On supply-chain risk, Renesas's GaN front-end is heavily tethered to 8-inch fabs in Taiwan, China, while tightening US export controls on MOCVD equipment structurally cap its capacity elasticity. Any accelerated decoupling would force domestic re-tooling at a 15-25% cost premium. Competitively, Infineon and ST anchor their GaN roadmaps in automotive high-voltage segments, leaving pure-play GaN firms like Navitas and EPC most exposed. Renesas's automotive-grade quality infrastructure and global distribution network form a moat they cannot replicate within a year. Expect Navitas to pivot toward 800 V platforms within 12 months to avoid head-on collision. Within 18 months, humanoid-robot joint drives (20-40 low-voltage GaN devices per unit) and AI power delivery will create a dual demand engine. The GaN/SiC voltage boundary will slide from 650 V to 400 V, and legacy silicon's share in industrial power could fall below 30% by 2027.