The 2SK596B from KEXIN is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 150 to 240 µA, Gate Source Voltage -20 V, Forward Transfer Admittance 0.4 to 1.2 mS, Continous Drain Current 1 mA, Gate Current 10 mA. Tags: Surface Mount. More details for 2SK596B can be seen below.