The TSM4946DCS from Taiwan Semiconductor is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 45 to 75 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for TSM4946DCS can be seen below.