Renesas introduces dual-side-cooled 650V GaN device for AI data centre power systems - New Electronics

Renesas's move is not a product launch—it is the first structural challenge to SiC's dominance above 650V. Dual-side cooling eliminates the thermal bottleneck that kept GaN out of the high-voltage tier, letting AI data-centre PSUs and DC-DC stages jump a density class while cutting cooling OPEX (roughly 35% of total) at the architecture level. The ripple runs both directions. Upstream, GaN epi-wafer and substrate suppliers (IQE, Sumitomo Electric) face repricing as utilisation climbs. Downstream, Delta, Vertiv, and Flex will ship next-gen 800V power modules within 12 months, eroding Infineon's and ST's SiC module share in the data-centre segment. On competition: Navitas and EPC have built early mindshare in data-centre GaN. Renesas enters at 650V with dual-side cooling, leveraging its automotive-grade quality narrative to capture enterprise accounts Navitas has not yet locked. Infineon's most probable counter is accelerating CoolGaN toward 700V and deploying a SiC-plus-GaN hybrid as a defensive hedge. The 12-to-24-month tail: 650V becomes the contested no-man's-land between GaN and SiC. A price war is likely before Q2 2026. Every 0.01 drop in PUE translates into a device-level efficiency mandate that will force the entire power-semiconductor stack to re-sort.