The 2N5457 from Central Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 1.0 to 5.0 mA, Gate Source Voltage 25 V, Gate Current 10 mA, Gate Reverse Current 1.0 nA, Power Dissipation 0.31 W. Tags: Through Hole. More details for 2N5457 can be seen below.