Industry Analysis
The 800V DC migration is not a voltage bump—it is a generational rupture in power electronics. When SiC content per rack jumps from $15K to $115K, every conversion stage mandates SiC devices while GaN hits its physical ceiling above 800V. ON Semi's 17x multiple versus TI's 28x is not a discount; it is a misclassification. The market still prices ON as an auto-cyclical, ignoring that it is becoming the toll collector on AI compute's power infrastructure. NVIDIA's MGX reference design creates BOM lock-in far more durable than a typical design win—once thermal and electrical validation is complete, rack-level switching costs are prohibitive. The real risk is not Infineon or ST, whose SiC capacity ramps lag by 12 to 18 months. It is the timing gap between 800V standard ratification, likely via OCP within 18 months, and ON's fab utilization curve. If that window misaligns, the sleeper thesis evaporates. But if AI revenue crosses 20% of mix, the re-rating from 17x to 25x-plus is not extrapolation—it is a business-model reclassification, analogous to how ADI repriced after its industrial-to-telecom pivot in 2019. The 800V cliff effect will binary-sort the SiC supplier landscape by mid-2027.
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