Infineon introduces 27 kW three-phase PSU solution for next- generation AI server power architectures - ELE Times

Infineon's 27kW three-phase PSU is not a product launch—it's a strategic lock-in on AI infrastructure's power bottleneck. Once single-rack density crosses 100kW, legacy 48V DC distribution becomes economically untenable; three-phase AC-to-DC conversion is the only viable path. Ripple effects extend well beyond the module. Upstream, SiC gate-drive specs and nanocrystalline core demand get fundamentally redefined. Downstream, PDU topologies shift to three-phase, cascading into transformer sizing and electrical room planning. Critically, reliance on SiC substrates from Taiwan, China and Japan makes Infineon's Arizona fab ramp a direct supply-chain security variable. Competitively, onsemi will likely respond within two quarters but remains constrained by GaN yield maturity. MPS may flank via 800V rectification, creating a divide-the-pie dynamic. In China's supply chain, Megmeet and OLT hold cost edges at the 4kW tier, but 27kW three-phase design carries an 18-month knowledge gap in high-frequency transformer topology and thermal management. Within 12–24 months, NVIDIA's Rubin platform will push PSU value from roughly 5% to 15%+ of server BOM. Power design ownership becomes the new battleground. Infineon's timing is deliberate: lock in design-in before the 800V DC ecosystem crystallizes. Once embedded in a reference design, switching costs become prohibitive for latecomers.