The STD2N105K5 from STMicroelectronics is a MOSFET with Continous Drain Current 1.5 A, Drain Source Resistance 6000 to 8000 Milliohm, Drain Source Breakdown Voltage 1050 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for STD2N105K5 can be seen below.