The TK125V65Z from Toshiba is a MOSFET with Continous Drain Current 24 A, Drain Source Resistance 105 to 125 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 TK125V65Z can be seen below.