The TK31V60W from Toshiba is a MOSFET with Continous Drain Current 30.8 A, Drain Source Resistance 78 to 98 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.7 to 3.7 V. Tags: Surface Mount. More details for TK31V60W can be seen below.