The 2N5434 from New Jersey Semiconductor is a Junction Field Effect Transistor (JFET) with Drain Saturation Current 30 mA, Gate Source Voltage -25 V, Forward Transfer Admittance 17 mS, Drain Source Breakdown Voltage 0.1 V, Drain Source Resistance 10 Ohm. Tags: Through Hole. More details for 2N5434 can be seen below.