The 2N4856 from Central Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 50 mA, Drain Source Resistance 25 Ohm, Gate Current 50 mA, Gate Reverse Current 0.25 nA, Power Dissipation 0.36 W. Tags: Through Hole. More details for 2N4856 can be seen below.