MOSFETs

A MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a device used to efficiently switch and control electrical power. It operates using a voltage at the gate to regulate current flow. MOSFETs are widely used in power supplies, automotive systems, motor drives, renewable energy, and data center applications because they enable fast switching, high efficiency, and compact system design.

onsemi offers a broad portfolio of MOSFET technologies to address different power and efficiency needs. These include low-voltage MOSFETs, Super Junction (SJ) MOSFETs, and advanced trench and PowerTrench® MOSFETs, which deliver low resistance and improved switching performance. The portfolio also includes shielded gate and automotive-qualified MOSFETs for high-reliability applications.

To choose the right MOSFET, consider key factors such as voltage rating, current requirements, switching frequency, and thermal performance. The optimal device balances efficiency, size, and cost while meeting application needs in areas such as power conversion, automotive systems, or industrial equipment.

MOSFETs reduce both switching and conduction losses, improving overall energy efficiency. Their fast switching speeds and low resistance help minimize heat generation and enable more compact, high-performance electronic systems.

onsemi ensures MOSFET reliability through rigorous design, testing, and qualification processes. This includes AEC-Q101 qualification, extensive electrical and thermal stress testing, and advanced packaging for improved heat dissipation. The company also uses process control and reliability modeling to ensure consistent performance in demanding applications like automotive, industrial, and energy systems.

onsemi MOSFETs are used in automotive, industrial, energy infrastructure, computing, and consumer applications. Key use cases include EV powertrains, battery management systems, solar inverters, data center power supplies, and motor control systems.

Yes, many onsemi MOSFETs are AEC-Q101 qualified, ensuring they meet rigorous automotive reliability standards. These devices are used in safety-critical systems such as electric drivetrains, onboard chargers, and advanced driver assistance systems (ADAS).

onsemi MOSFETs are available in a variety of surface-mount and through-hole packages, including advanced thermal options like TCPAK and Power QFN. These packages enhance heat dissipation, reduce parasitics, and support higher power density designs.

MOSFETs offer faster switching speeds and higher efficiency at lower voltages, making them ideal for high-frequency applications. IGBTs are better suited for very high voltage and current applications but typically switch more slowly. The choice depends on system requirements.

You can access datasheets, simulation models, reference designs, and application notes on the onsemi website. These resources help engineers evaluate MOSFET performance and accelerate system design.