The STF28N60DM2 from STMicroelectronics is a MOSFET with Continous Drain Current 21 A, Drain Source Resistance 130 to 160 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage - 25 to 25 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for STF28N60DM2 can be seen below.