The SST4393 from CALOGIC is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 5 to 30 mA, Gate Source Voltage -40 V, Drain Source Resistance 100 Ohm, Gate Current 10 mA, Gate Reverse Current -200 nA. Tags: Surface Mount. More details for SST4393 can be seen below.