The STF5N105K5 from STMicroelectronics is a MOSFET with Continous Drain Current 3 A, Drain Source Resistance 2900 to 3500 Milliohm, Drain Source Breakdown Voltage 1050 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for STF5N105K5 can be seen below.