The TK1K9A60F from Toshiba is a MOSFET with Continous Drain Current 3.7 A, Drain Source Resistance 1600 to 1900 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for TK1K9A60F can be seen below.