The TK31Z60X from Toshiba is a MOSFET with Continous Drain Current 30.8 A, Drain Source Resistance 73 to 88 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Through Hole. More details for TK31Z60X can be seen below.