The 2N5556 from New Jersey Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 0.5 to 2.5 mA, Gate Source Voltage 0.2 to 4.0 V, Drain Source Breakdown Voltage 25 V, Input Capacitance 6.0 pF. Tags: Through Hole. More details for 2N5556 can be seen below.