The STL40N75LF3 from STMicroelectronics is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 16 to 22 Milliohm, Drain Source Breakdown Voltage 75 V, Gate Source Voltage -16 to 20 V, Gate Source Threshold Voltage 1 V. Tags: Surface Mount. More details for STL40N75LF3 can be seen below.