The STMicroelectronics Transistors - FETs, MOSFETs - RF PD85004 is a high-performance RF MOSFET transistor designed for use in RF power applications. This device features a low gate-source capacitance, low gate-drain capacitance, and low gate-drain leakage current, making it ideal for use in high-frequency applications. It also has a high breakdown voltage and a high power dissipation rating, making it suitable for use in high-power applications. The device is also designed to be highly reliable and has a long lifetime. This makes it an ideal choice for use in a variety of RF power applications.