The TK19A45D from Toshiba is a MOSFET with Continous Drain Current 19 A, Drain Source Resistance 190 to 250 Milliohm, Drain Source Breakdown Voltage 450 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for TK19A45D can be seen below.