The CMPF4392 TR from Central Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 25 to 75 mA, Gate Source Voltage 40 V, Drain Source Resistance 60 Ohm, Gate Current 50 mA, Gate Reverse Current 0.5 nA. Tags: Surface Mount. More details for CMPF4392 TR can be seen below.