The STD60NF55LAT4 from STMicroelectronics is a MOSFET with Continous Drain Current 60 A, Drain Source Resistance 12 to 17 Milliohm, Drain Source Breakdown Voltage 55 V, Gate Source Voltage -15 to 15 V, Gate Source Threshold Voltage 1 to 2 V. Tags: Surface Mount. More details for STD60NF55LAT4 can be seen below.