This part is a kind of semiconductor called STK0260.
Function of this product has Advanced Power MOSFET.
Manufacturers : AUK
Image and pinout :

Some of the text within the PDF file :
Semiconductor STK0260 Advanced Power MOSFET SWITCHING REGULATOR APPLICATIONS Features • • • • High Voltage: BVDSS=600V(Min.) Low Crss : Crss=6.0pF(Typ.) Low gate charge : Qg=8.4nC(Typ.) Low RDS(on) :RDS(on)=4.7Ω(Max.) Type NO. STK0260 Marking STK0260 Package Code MPT Ordering Information Outline Dimensions 7.30~7.50 unit : mm 8.40~8.60 DataShee 1.20 Max. 1.70 Typ. 0.70 Max. 13.05~13.85 2.50 Typ. 0.60 Max. 2.50 Typ. 1 2 3 0.60 Max. 3.30~3.50 1.95~2.05 PIN Connections 1. Gate 2. Drain 3. Source KSD-T0H010-001 DataSheet 4 U .com 1 STK0260 Absolute maximum ratings Characteristic Drain-source voltage Gate-source voltage Drain current (DC) Drain current (Pulsed) * (Ta=25°C) [ ... ]
STK0260 PDF Datasheet Download
