The 2N4861 from Central Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 8.0 to 80 mA, Gate Source Voltage 0.8 to 4.0 V, Drain Source Resistance 60 Ohm, Gate Current 50 mA, Power Dissipation 1.8 W. Tags: Through Hole. More details for 2N4861 can be seen below.