The SFU290 from Solid State Devices is a Junction Field Effect Transistor (JFET) with Gate Source Voltage -30 V, Continous Drain Current 500 mA, Drain Source Resistance 3.0 Ohm, Power Dissipation 0.350 W, Operating Temperature -55 to 150 Degree C. Tags: Through Hole. More details for SFU290 can be seen below.