The UN500N23TE from UN Semiconductor is a MOSFET with Continous Drain Current 0.66 A, Drain Source Resistance 2000 to 3000 milli-ohm, Drain Source Breakdown Voltage 50 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.5 to 1.5 V. Tags: Surface Mount. More details for UN500N23TE can be seen below.