AUIRF540Z MOSFET Transistor, N Channel, 36 A, 100 V, 0.021 ohm. The AUIRF540Z is a 100V single N-channel HEXFET® Power MOSFET utilizes the latest processing techniques to achieve extremely low on-resistance per silicon area. Additional features of this design are a 175°C junction operating temperature, fast switching speed and improved repetitive avalanche rating. It features combine to make this design an extremely efficient and reliable device for wide variety of applications.