This part is a kind of semiconductor called STK0260D.

Function of this product has Advanced Power MOSFET.

Manufacturers : AUK

Image and pinout :

Some of the text within the PDF file :

Semiconductor STK0260D 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)=4.0Ω(Max.) Type NO. STK0260D Marking STK0260 Package Code D-PAK Ordering Information Outline Dimensions unit : mm 6.50~6.70 5.10~5.50 1.18 Max. 2.10~2.50 DataShee 7.77~7.97 1.15 Max. 0.83 Max. 2.30 Typ. 2.30 Typ. 0.55 Max. 1 2 3 PIN Connections 1. Gate 2. Drain 3. Source KSD-T6O004-000 DataSheet 4 U .com 1 STK0260D Absolute maximum ratings Characteristic Drain-source voltage Gate-source voltage Drain current (DC) Drain current (Pulsed) * (Tc=25°C) Symbol VDSS VGSS [ ... ]

STK0260D PDF Datasheet Download