The STFW8N120K5 from STMicroelectronics is a MOSFET with Continous Drain Current 6 A, Drain Source Resistance 1650 to 2000 Milliohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for STFW8N120K5 can be seen below.