The TK20A20D from Toshiba is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 70 to 109 Milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.5 to 3.5 V. Tags: Through Hole. More details for TK20A20D can be seen below.