The 2SK508G-K53-AE3-R is a Junction Field-Effect Transistor (JFET) packaged in a small surface-mount technology (SOT-23-3) package and is RoHS compliant. It is manufactured by Unisonic Technologies. It is designed for high frequency switch in amplifier stages, cutoff current controlled switches, and for local feedback in variable gain amplifiers. This device features high DC current gain, low capacitance, low-on resistance, and low leakage currents. It also has an operating temperature range of -55°C to 150°C.