The STD45N10F7 from STMicroelectronics is a MOSFET with Continous Drain Current 45 A, Drain Source Resistance 14.5 to 18 Milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 4.5 V. Tags: Surface Mount. More details for STD45N10F7 can be seen below.