Nio Expands Supply Deal with onsemi: The 900V Silicon Carbide Revolution
In the race for EV dominance in 2026, voltage is the new battleground. Nio has chosen onsemi’s EliteSiC technology to power its transition to 900V architectures. By utilizing advanced Silicon Carbide MOSFETs, Nio is moving away from traditional silicon to unlock performance levels that were previously impossible for mass-market vehicles.
Table of Contents
- The 900V Advantage
- onsemi’s Role
- Impact on Nio’s 2026 Lineup
- The Market Reality
The 900V Advantage: Why It Matters
Moving from 400V or 800V to a 900V system provides several mechanical and electrical advantages. Consequently, this shift is transforming how Nio vehicles perform on the road.
- Ultra-Fast Charging: The 900V architecture allows Nio’s latest models to add roughly 250 km of range in just 12 minutes.
- Lower Heat, Higher Efficiency: Silicon Carbide (SiC) handles high temperatures much better than standard silicon. As a result, the drivetrain loses less energy to heat.
- Lighter Wiring: Higher voltage allows for thinner and lighter copper wiring. This reduces the overall weight of the vehicle, further extending the driving range.
Onsemi’s Role: Vertical Integration & 200mm Wafers
A key reason Nio expanded its deal with onsemi is the manufacturer’s vertical integration. In 2026, onsemi successfully ramped up production on 200mm (8-inch) SiC wafers at its Bucheon facility.
- Increased Supply: The 200mm wafers provide nearly 80% more chips per wafer compared to older 150mm technology.
- Quality Control: Because onsemi controls the process from “boule growth” (creating the raw crystal) to final packaging, Nio is guaranteed a stable supply of high-performance chips.
- EliteSiC M3e Generation: Nio is specifically utilizing the latest M3e MOSFETs, which reduce conduction losses by another 30% compared to previous generations.
Impact on Nio’s 2026 Lineup
The expanded deal primarily supports Nio’s most advanced models. Furthermore, the integration of these chips is a cornerstone of Nio’s “Full-Stack Technology” strategy.
The Market Reality: Efficiency vs. Cost
While Silicon Carbide is superior to standard silicon, it is also more expensive. However, Nio CEO William Li recently noted that the efficiency gains—specifically a 4% to 6% increase in range—offset the higher chip costs by allowing for slightly smaller, lighter battery packs.
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