This part is a kind of semiconductor called C5027S.

Function of this product has Plastic-Encapsulate Transistors.

Manufacturers : ATE

Image and pinout :

Some of the text within the PDF file :

先进科技电子有限公司 Advanced CO.,LTD. Technology Electronics TO-126 Plastic-Encapsulate Transistors ATE 先进科技电子有限公司 Advanced CO.,LTD. Technology Electronics 1/2 先进科技电子有限公司 Advanced CO.,LTD. Technology Electronics ATE 先进科技电子有限公司 Advanced CO.,LTD. Technology Electronics 2/2 [ ... ]

C5027S PDF Datasheet Download