The 2N4393 from Solitron Devices 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 50 mA, Gate Reverse Current -200 nA. Tags: Through Hole. More details for 2N4393 can be seen below.