The TSM3401CX from Taiwan Semiconductor is a MOSFET with Continous Drain Current -3 A, Drain Source Resistance 50 to 90 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -3 to -1 V. Tags: Surface Mount. More details for TSM3401CX can be seen below.