The TK190U65Z from Toshiba is a MOSFET with Continous Drain Current 15 A, Drain Source Resistance 149 to 190 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 TK190U65Z can be seen below.