The TSM1N80CW from Taiwan Semiconductor is a MOSFET with Continous Drain Current 0.3 A, Drain Source Resistance 18000 to 21600 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for TSM1N80CW can be seen below.