The 3N172 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 -3.0 to -6.5 V, Gate Source Threshold Voltage -2.0 to -5.0 V. Tags: Through Hole. More details for 3N172 can be seen below.