MOSFET Ensures Automotive Thermal Reliability

Why It Matters

The MOSFET’s compact size and superior thermal performance enable higher efficiency and reliability in increasingly electrified vehicle powertrains, reducing system cost and weight.

Key Takeaways

• 100‑V MOSFET adds to Diodes' 40‑80 V portfolio.
• 1.5 mΩ on‑resistance cuts conduction losses in motor drives.
• 64 mm² package shrinks footprint 40 % versus TO‑263.
• 0.3 °C/W thermal resistance supports 847 A drain current.
• AEC‑Q101 qualified for +175 °C operation, ensuring reliability.

Pulse Analysis

Automotive electrification is driving demand for power semiconductors that combine high current capability with minimal heat generation. Traditional TO‑263 packages struggle to meet the space and thermal constraints of modern vehicle architectures, prompting designers to seek alternatives that can fit tighter layouts while maintaining performance. Diodes’ new 100‑V MOSFET addresses this gap by delivering a low on‑resistance of 1.5 mΩ, which directly reduces I²R losses in 48‑V brushless DC motor drives used for steering and braking, thereby improving overall vehicle efficiency.

Beyond efficiency, thermal management is a critical challenge in automotive power electronics. The DMTH10H1M7SPGWQ’s PowerDI8080‑5 package features copper‑clip die bonding that achieves a thermal resistance as low as 0.3 °C/W, allowing the device to sustain drain currents up to 847 A without overheating. Its gull‑wing lead configuration not only supports automated optical inspection but also enhances temperature‑cycling reliability, essential for meeting the rigorous AEC‑Q101 qualification and operation at ambient temperatures up to +175 °C. These attributes make the MOSFET a robust choice for high‑stress applications such as power‑steering and regenerative braking systems.

From a market perspective, the MOSFET’s competitive price point of $1.71 for 5,000 units lowers the total cost of ownership for OEMs seeking to reduce vehicle weight and component count. The 40 % reduction in PCB footprint compared with legacy D2PAK solutions frees up valuable board real‑estate, enabling more compact power modules and facilitating the integration of additional functionality. As automotive manufacturers accelerate the shift toward 48‑V architectures and eventually higher voltage platforms, components like Diodes’ DMTH10H1M7SPGWQ will be pivotal in delivering the thermal reliability and efficiency required for next‑generation electric vehicles.