The TK065U65Z from Toshiba is a MOSFET with Continous Drain Current 38 A, Drain Source Resistance 51 to 65 milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4 V. Tags: Surface Mount. More details for TK065U65Z can be seen below.