The TSM3457CX6 from Taiwan Semiconductor is a MOSFET with Continous Drain Current -5 A, Drain Source Resistance 50 to 100 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 TSM3457CX6 can be seen below.