The 2SK3557-6-TD-E from onsemi is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 10 to 32 mA, Forward Transfer Admittance 24 to 35 mS, Continous Drain Current 50 mA, Gate Current 10 mA, Gate Reverse Current -1.0 nA. Tags: Surface Mount. More details for 2SK3557-6-TD-E can be seen below.