This part is a kind of semiconductor called EE16H.

Function of this product has Rapid Transformer Sample Service.

Manufacturers : Power Integrations

Image and pinout :

Some of the text within the PDF file :

Rapid Transformer Sample Service EE16(H), 8 pin Bobbin Mechanical Drawing 18.7 max 21.4 max 4.7 max 1 PCB Layout 8 7 6 2 3 4 0.75 sq 15.5 max 4 5 5 1 2 7.5 3 4 3.75 TOP VIEW 15 UNIT:mm [ ... ]

EE16H PDF Datasheet Download