The TK10A55D from Toshiba is a MOSFET with Continous Drain Current 10 A, Drain Source Resistance 560 to 720 milliohm, Drain Source Breakdown Voltage 550 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for TK10A55D can be seen below.