The STD5NM60 from STMicroelectronics is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 900 to 1000 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for STD5NM60 can be seen below.