The 3N173 from CALOGIC is a MOSFET with Continous Drain Current 50 mA, Drain Source Resistance 350 ohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -2.5 to -6.5 V, Gate Source Threshold Voltage -2.0 to -5.0 V. Tags: Through Hole. More details for 3N173 can be seen below.