PCIM 2026: Accepting local component deficits for system-level benefits

ROHM’s PCIM 2026 demonstration of deliberately accepting suboptimal thermal resistance marks a paradigm shift from device-centric to system-optimized design in power electronics. This approach pressures upstream substrate and epitaxy suppliers to recalibrate defect tolerance standards, while compelling downstream inverter and OBC makers to redesign thermal architectures. Although the EU’s new Green Electronics Act doesn’t directly regulate SiC dies, its stringent system-level energy efficiency and carbon footprint mandates make such trade-offs a compliance necessity—reducing reliance on peak-performance chips and enhancing local component flexibility. Infineon and STMicroelectronics will likely counter with integrated modules prioritizing packaging over raw die performance, while Wolfspeed risks losing system-level influence by over-optimizing wafer metrics. Within 18 months, BOM cost structures for automotive power modules will pivot: thermal interface materials and packaging gain share at the expense of die performance premiums, reshaping global SiC profit pools.