The STW9NK90Z is a high voltage Power MOSFET designed by STMicroelectronics, intended to deliver the best in class performance for high efficiency and power density. This Power MOSFET is part of the SuperMESH™ family, which is well-known for its unique combination of features that include extremely low on-resistance, robust switching performance, and Zener protection.

With a drain-source voltage (V<sub>DS) of 900V, the STW9NK90Z ensures that the device can handle high voltage applications with ease. The device's low threshold voltage (V<sub>th) and the 1.7ohm on-resistance (R<sub>DS(on)) contribute to its high efficiency, making it suitable for a variety of power applications such as switching regulators, switching converters, motor drivers, relay drivers, and more.

The STW9NK90Z comes in a TO-247 package, which is known for its high power dissipation capabilities. This makes it an excellent choice for applications requiring high current, up to 8A. The TO-247 package also ensures that the MOSFET can be cooled effectively, which is critical for maintaining performance and reliability over time.

One of the key features of the STW9NK90Z is its Zener-protected gate, which provides enhanced protection against overvoltage, ensuring the longevity and reliability of the device. This built-in protection is especially valuable in harsh environments where voltage spikes may occur.

The device is also characterized by its fast switching speed and low gate charge (Q<sub>g), which further enhance its efficiency in high-speed switching applications. The low input capacitance (C<sub>iss) and low gate input resistance (R<sub>g) make the MOSFET easy to drive and control.

In summary, the STW9NK90Z Power MOSFET from STMicroelectronics is a robust and efficient solution for high voltage applications that require a combination of high performance, reliability, and protection. Its SuperMESH™ technology, low on-resistance, and Zener protection make it a highly competitive device in the power electronics market.