The TSM9409CS from Taiwan Semiconductor is a MOSFET with Continous Drain Current -3.5 A, Drain Source Resistance 125 to 200 milliohm, Drain Source Breakdown Voltage -60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 V. Tags: Surface Mount. More details for TSM9409CS can be seen below.