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The global shift toward high-voltage electric vehicle (EV) architectures is redefining what power electronics can—and must—do. As automotive systems move from 400 V to 800 V platforms, every component in the drivetrain faces new demands for temperature tolerance, faster switching, and higher efficiency. At the heart of this transformation lies Silicon Carbide (SiC) — the semiconductor material enabling the next leap in EV performance.
Why Silicon Carbide Is Changing the EV Equation
Traditional silicon-based power devices have served well for decades, but as battery voltages climb and efficiency mandates tighten, their thermal and switching limits are becoming evident. SiC devices, by contrast, offer:
- Superior thermal endurance — sustaining up to 400 °F without performance degradation.
- High switching frequencies — reaching 24 kHz, allowing smaller, lighter passive components.
- Compatibility with 800 V battery systems, unlocking faster charging and reduced energy loss.
- Manufacturing precision — Bosch’s proprietary trench etching process (“Bosch process”) enables highly reliable, high-density SiC devices ideal for automotive-grade applications.
These advantages don’t just improve performance—they change the economics of EV powertrains. Greater efficiency means less cooling overhead, lighter systems, and longer range for the same battery capacity.
A Case in Motion: The 400 V e-Axle in Xiaomi’s SU7
Bosch’s 400 V e-axle, powered by SiC technology, represents one of the most advanced examples of applied efficiency in motion. Featured in Xiaomi’s first EV, the SU7, this system integrates the motor, power electronics, and gearbox into a single compact unit—reducing weight and enhancing overall drive efficiency.
The use of SiC components enables higher energy conversion rates and optimized power density, contributing to smoother acceleration and improved range without increasing system size. It’s a real-world proof of how SiC is driving the next generation of electric mobility.
Application-Ready Flexibility Across Power Systems
Bosch’s SiC portfolio covers a complete spectrum of requirements across mobility and industrial power applications. Each configuration is designed for performance scalability and design flexibility, meeting high-current demands while maintaining thermal stability.
| Product Type | Applications | Core Advantage |
| Bare Die (1200 V, 750 V) | Traction inverters, DC–DC converters | Maximum flexibility for custom design |
| Discrete (1200 V, 750 V) | On-board chargers, industrial motor drivers | Compact, high-reliability solution |
| Compact SiC Line (CSL) | Commercial vehicle drivetrains | High efficiency with integrated cooling |
| Discrete SiC-Line (DSL) | Off-highway vehicles, solar systems | High-current discrete solutions |
| SiC Power Module on Cooler | High-power EV and solar systems | Ready-to-use with integrated cooling |
Together, these solutions enable designers and manufacturers to achieve the delicate balance of power density, thermal control, and integration efficiency.
A New Standard for Power Electronics
The move toward 800 V systems is not just an evolution—it’s a redesign of the electrical backbone of modern vehicles and energy systems. Bosch’s SiC power devices make this leap practical and scalable, offering a roadmap for manufacturers to move faster toward higher voltage, lower loss architectures.
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As an authorized distributor of Bosch Semiconductors, Millennium Semiconductors bridges the gap between design innovation and supply reliability.
With 30+ years of experience, 100+ global partners, and complete 360° supply chain capabilities—from JIT and DOL to global consolidation—Millennium empowers manufacturers to integrate next-generation power technologies seamlessly.
To explore how Bosch’s SiC technology can accelerate your next build,
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