The UN300N52TE from UN Semiconductor is a MOSFET with Continous Drain Current 0.2 A, Drain Source Resistance 1.1 to 13 ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.2 V. Tags: Surface Mount. More details for UN300N52TE can be seen below.