The J212 from New Jersey Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 15 to 40 mA, Gate Source Voltage -25 V, Forward Transfer Admittance 7000 to 12000 mS, Gate Current 10 mA, Gate Reverse Current -100 pA. Tags: Through Hole. More details for J212 can be seen below.