The TK20J60W from Toshiba is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 130 to 155 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: Through Hole. More details for TK20J60W can be seen below.