The 2N4338 from Solitron Devices is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 0.2 to 0.6 mA, Gate Source Voltage -50 V, Forward Transfer Admittance 600 to 1800 µs, Continous Drain Current 0.1 µA, Drain Source Resistance 2500 Ohm. Tags: Through Hole. More details for 2N4338 can be seen below.