The STD1NK60T4 from STMicroelectronics is a MOSFET with Continous Drain Current 1 A, Drain Source Resistance 7300 to 8500 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.25 to 3.7 V. Tags: Surface Mount. More details for STD1NK60T4 can be seen below.