This part is a kind of semiconductor called P02-102-11A9.
Function of this product has Transmitter Filter.
Manufacturers : Speed Tech
Image and pinout :

Some of the text within the PDF file :
!"! # $%&'("! # $ ! " # $ "% & $ %' $ ( ! " # $ "% ) $ [ ... ]
P02-102-11A9 PDF Datasheet Download
