The 2N5019 from New Jersey Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current -5 mA, Gate Source Voltage 30 V, Continous Drain Current 5 mA, Drain Source Resistance 150 Ohm, Gate Current 50 mA. Tags: Through Hole. More details for 2N5019 can be seen below.