The STB14NK60ZT4 from STMicroelectronics is a MOSFET with Continous Drain Current 13.5 A, Drain Source Resistance 450 to 500 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4.5 V. Tags: Surface Mount. More details for STB14NK60ZT4 can be seen below.