The 2SK492E from Isahaya Electronics is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 5.0 to 12 mA, Gate Source Voltage -50 V, Forward Transfer Admittance 6 to 15 mS, Continous Drain Current 1 to 12 mA, Drain Source Resistance 70 Ohm. Tags: Surface Mount. More details for 2SK492E can be seen below.