The STF40NF06 from STMicroelectronics is a MOSFET with Continous Drain Current 23 A, Drain Source Resistance 24 to 28 Milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for STF40NF06 can be seen below.