The TK6A50D from Toshiba is a MOSFET with Continous Drain Current 6 A, Drain Source Resistance 1200 to 1400 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 TK6A50D can be seen below.