The STP40NF10L from STMicroelectronics is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 28 to 36 Milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -17 to 17 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Through Hole. More details for STP40NF10L can be seen below.