The 2SK3566 from Toshiba is a MOSFET with Continous Drain Current 2.5 A, Drain Source Resistance 5600 to 6400 milliohm, Drain Source Breakdown Voltage 900 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for 2SK3566 can be seen below.