The 3N164 from CALOGIC is a MOSFET with Continous Drain Current 50 mA, Drain Source Resistance 300 ohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage -2 to -5 V. Tags: Through Hole. More details for 3N164 can be seen below.