The 2N3921 from New Jersey Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 1 to 10 mA, Gate Source Voltage -50 V, Forward Transfer Admittance 1500 to 7500 mS, Gate Current 50 mA, Gate Reverse Current -1 nA. Tags: Through Hole. More details for 2N3921 can be seen below.