The 2N6550 from New Jersey Semiconductor is a Junction Field Effect Transistor (JFET) with Gate Source Voltage -20 V, Forward Transfer Admittance 25 to 150 mS, Continous Drain Current 10 to 250 mA, Gate Current 50 mA, Gate Reverse Current -3 nA. Tags: Through Hole. More details for 2N6550 can be seen below.