The STS4DNF60L from STMicroelectronics is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 45 to 65 Milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -15 to 15 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for STS4DNF60L can be seen below.