The STB50N65DM6 from STMicroelectronics is a MOSFET with Continous Drain Current 33 A, Drain Source Resistance 74 to 91 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage - 25 to 25 V, Gate Source Threshold Voltage 3.25 to 4.75 V. Tags: Surface Mount. More details for STB50N65DM6 can be seen below.