The TK12A45D from Toshiba is a MOSFET with Continous Drain Current 12 A, Drain Source Resistance 430 to 520 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 TK12A45D can be seen below.