The MMBF4117 from onsemi is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 30 to 90 µA, Gate Source Voltage -40 V, Gate Current 50 mA, Gate Reverse Current -25 nA, Power Dissipation 0.225 W. Tags: Surface Mount. More details for MMBF4117 can be seen below.