This part is a kind of semiconductor called BC846A.

Function of this product has NPN Small Signal Transistor 310mW.

Manufacturers : Micro Commercial Components

Image and pinout :

Some of the text within the PDF file :

MCC Features l l l
  omponents 21201 Itasca Street Chatsworth    !"# $ %    !"# BC846A THRU BC848C NPN Small Signal Transistor 310mW SOT-23 A D Ideally Suited for Automatic Insertion 150 C Junction Temperature For Switching and AF Amplifier Applications o Mechanical Data l Case: SOT-23, Molded Plastic l Terminals: Solderable per MIL-STD-202, Method 208 l Polarity: See Diagram l Weight: 0.008 grams ( approx.) Type BC846A BC846B BC847A BC847B Marking Code (Note 2) Marking Type 1A BC847C 1B BC848A 1E BC848B 1F BC848C Marking 1G 1J 1K 1L C B F E G H J Maximum Ratings @ 25oC Unless Otherwise Specified DIMENSIONS BC846 BC847 BC848 Collector-Emitter Voltage BC846 BC847 BC848 Emitter-Base Voltage BC846,BC847 BC848 Collector Curr [ ... ]

BC846A PDF Datasheet Download