The CMPFJ177 BK from Central Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 1.5 to 20 mA, Gate Source Voltage 30 V, Drain Source Resistance 300 Ohm, Gate Current 50 mA, Gate Reverse Current 1.0 nA. Tags: Surface Mount. More details for CMPFJ177 BK can be seen below.