The TK15J50D from Toshiba is a MOSFET with Continous Drain Current 15 A, Drain Source Resistance 330 to 400 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for TK15J50D can be seen below.