Renesas unveils first 650V GaN in dual-side-cooled 8mm x 8mm package for megawatt-scale AI data centers - Semiconductor Today

Renesas isn't shipping a part—it's killing the silicon era in data center power delivery. Once GB200-class racks push past 120 kW, Si IGBTs hit a hard thermal wall at 650 V. Dual-side cooling is the only physics-compliant answer above 300 W/in², not an optional feature. The 8×8 mm footprint compresses driver, gate, and thermal paths to the limit, forcing PSU vendors to rebuild PCB layout, heatsink architecture, and thermal simulation from scratch. Upstream, 650 V GaN epi-wafer yield remains hostage to MOCVD defect control, with effective capacity concentrated at two or three nodes. Any geopolitical friction on tooling or substrate supply will amplify lead-time volatility. Renesas is slotting in precisely during the window where Infineon's GaN roadmap hasn't addressed dual-side-cooled packages and Navitas or EPC are still grinding in the 400 V segment. Within 18 months, expect Delta, Lite-On, and Flex to re-tender around 650 V GaN. GaN penetration in data center power will jump from under 5% to 25%+. Whoever locks in long-term epi-wafer offtake first secures the ticket to the next AI infrastructure cycle.