The 3N163 from CALOGIC is a MOSFET with Continous Drain Current 50 mA, Drain Source Resistance 250 ohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -40 to 40 V, Gate Source Threshold Voltage -2 to -5 V. Tags: Through Hole. More details for 3N163 can be seen below.