Low-voltage MOSFETs and supply chain resilience are powering the next generation of automotive electronics
As automotive architectures evolve toward electrification, increased compute density, and zonal control, one class of semiconductor is quietly becoming indispensable: low-voltage (<200V) power MOSFETs. These devices underpin everything from motor drives to DC-DC conversion, enabling efficiency, power density, and reliability in increasingly electrified vehicles.
The expanding application landscape for these devices highlights a critical aspect: the need for supply chain diversity and resilience. Together, these factors are reshaping how OEMs, Tier Ones, and distribution partners approach design and sourcing.
Low-voltage MOSFETs are no longer confined to legacy body electronics. As vehicles adopt higher levels of electrification and intelligent control, their role is expanding rapidly, across subsystems.
Modern vehicles continue to rely heavily on 12V systems, but the shift toward 48V architectures is accelerating. These voltage domains require MOSFETs typically ranging from 40V to 150V, providing design headroom and efficiency.
Applications span:
- Seat control and HVAC systems
- Infotainment and cockpit electronics
- Heat pumps and fuel pumps
- Body control modules
These subsystems continue to grow, regardless of whether the vehicles are ICE, hybrid, or battery electric vehicles.
Motor drive proliferation
One of the biggest growth drivers is the increasing number of electric motors in vehicles. Virtually every actuation function, from mirrors, suspension, and seating, relies on brushless DC motor drivers requiring MOSFET-based switching stages.
Each of these stages involves critical functions with tight efficiency constraints, including half-bridge or three-phase motor drivers and high-current switching. This proliferation effectively turns the car into a dense network of distributed power stages.
At higher power levels (above ~500W), MOSFETs are critical in systems such as:
- Electric compressors
- Electric turbochargers
- Electric suspension systems
- Onboard DC-DC converters
These applications demand low RDS(ON) devices and advanced packaging to minimize losses and manage heat effectively.
Zonal architectures and ADAS compute
Zonal E/E architectures and advanced driver-assistance systems (ADAS) are driving a new class of power conversion challenges. These systems now resemble a server on a car, requiring multi-stage power conversion (e.g., 48V to 5V to point-of-load).
Low-voltage MOSFETs play a central role in:
- Multi-phase DC-DC converters
- Power delivery to CPUs, GPUs, and AI processors
- High-efficiency switching with minimal losses
Across all these applications, a key trend is the push for higher power density, or more power in less space. This is driving innovation in both silicon and packaging. Generation 5 MOSFETs from Vishay reduce both on-resistance and gate charge, with faster switching that enables higher frequency operation, and advanced packages that reduce parasitic resistance and inductance. The result is more compact, efficient, and thermally manageable power stages.
To support these emerging applications, Vishay is advancing across three main technology pillars:
1. Advanced silicon (Gen 5 and beyond)
Generation 5 MOSFETs introduce improvements in:
- Lower RDS(ON) leading to reduced conduction losses
- Reduced gate charge, for faster switching and lower switching losses
These improvements enable designers to increase switching frequency while reducing component size and improving overall converter efficiency.
2. Packaging innovation
Packaging has become just as important as silicon performance. The areas where Vishay focuses its efforts include source clip technology to reduce package resistance, top-side cooling to improve thermal performance, and integrated half-bridge packages to reduce parasitics.
Top-side cooling, in particular, enables heat to be transferred directly to a heatsink rather than through the PCB, reducing thermal stress on surrounding components and allowing smaller board designs.
3. Reliability enhancements
Automotive applications demand stringent reliability. Vishay goes beyond standard AEC-Q101, extending testing from 1,000 to 2,000 hours to ensure robustness in demanding environments.
Enabling technologies for automotive silicon MOSFETs
| Designed beyond AEC-Q101 | High performance silicon | Broad package selections |
|---|---|---|
| High reliability in critical high stress applications | N & P channel MOSFETs with BVDSS -200 V to 650 V | Solutions for increasing power density |
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Source: Vishay
Supply chain resilience is now a strategic requirement
While performance is critical, supply continuity is a second but equally important factor. Vishay’s manufacturing strategy spans multiple regions:
- Front-end wafer processing in the US and Europe
- Additional capacity expansion in the UK (Newport)
- Back-end facilities in China and Taiwan
- Supplemental OSAT partners in Malaysia and the Philippines
This geographically distributed approach reduces dependency on any single region. To address growing demand, Vishay is investing in new facilities, including a 12-inch fab in Germany, targeted for qualification in 2026, planned production ramp with advanced technologies in 2027, and significant increases in wafer and die capacity.
This expansion not only increases supply availability but also supports cost optimization over time.
Reduced geopolitical and operational risk
Customers, particularly in North America, are increasingly requesting production options outside China and Taiwan. Vishay is actively addressing this by diversifying backend operations, qualifying additional manufacturing partners and expanding regional flexibility.
The convergence of expanding applications and supply chain pressures creates a clear set of priorities for designers and sourcing teams:
- Prioritize power density and efficiency: Advanced MOSFET technologies are essential for meeting thermal and space constraints.
- Evaluate packaging as a performance lever: Thermal and parasitic characteristics are increasingly determined by package design.
- Design for supply flexibility: Selecting components with multiple sourcing options reduces long-term risk.
- Engage early with suppliers and partners: Alignment on roadmap, capacity, and reliability is critical for program success.
In this evolving landscape, authorized distribution plays a pivotal role in bridging technology and supply assurance. Avnet helps customers to understand new MOSFET generations and packaging innovations, evaluate trade-offs between performance, cost, and thermal design, and accelerate qualification and design-in processes.
With visibility across suppliers and regions, Avnet supports multi-source strategies, inventory management and continuity planning, and alignment with customer-specific sourcing requirements.
As automotive supply chains become more fragmented and regionalized, Avnet provides:
- Local engineering and commercial support
- Access to global inventory and logistics networks
- Coordination between OEMs, Tier Ones, and semiconductor suppliers
Powering innovation with performance and resilience
Low-voltage automotive MOSFETs are at the heart of the next generation of vehicle electronics, from distributed motor drives to high-performance compute platforms. Their role will only expand as vehicles become more electrified, connected, and software-defined.
However, performance alone is no longer enough. Supply chain diversity, geographic flexibility, and manufacturing resilience are now essential design considerations.
Vishay’s multi-fab strategy, advanced technology roadmap, and focus on packaging innovation demonstrate how semiconductor suppliers are adapting to these new realities. When coupled with a strong distribution partner like Avnet, capable of aligning technology, supply continuity, and customer requirements, the result is a more robust path from concept to production.
