The TSM3N80CZ from Taiwan Semiconductor is a MOSFET with Continous Drain Current 3 A, Drain Source Resistance 3300 to 4200 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for TSM3N80CZ can be seen below.