This part is a kind of semiconductor called STR-D1816.
Function of this product has STR-D1816.
Manufacturers : ETC
Image and pinout :

Some of the text within the PDF file :
DataSheet 4 U .com 1100 CRAIOVA 0251.413.620-415.995 etcom Componente Electronice Optoelectronice Smd Module Electronice http:www.adelaida.ro E-mail:sales@adelaida.ro DataSheet 4 U .com [ ... ]
STR-D1816 PDF Datasheet Download
