This part is a kind of semiconductor called BC807-16.

Function of this product has 45V PNP SMALL SIGNAL TRANSISTOR IN SOT23 .

Manufacturers : Diodes Incorporated

Image and pinout :

Some of the text within the PDF file :

Features  Ideally Suited for Automatic Insertion  Epitaxial Planar Die Construction  Complementary NPN Types Available (BC817)  For switching and AF Amplifier Applications  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. "Green" Device (Note 3)  Qualified to AEC-Q101 Standards for High Reliability  PPAP Capable (Note 4) SOT23 BC807-16/-25/-40 45V PNP SMALL SIGNAL TRANSISTOR IN SOT23 Mechanical Data  Case: SOT23  Case Material: Molded Plastic, “Green” Molding Compound  UL Flammability Classification Rating 94V-0  Moisture Sensitivity: Level 1 per J-STD-020  Terminals: Finish – Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208  Weight 0.008 grams (approximate) C B Top View E Device Symbol Top [ ... ]

BC807-16 PDF Datasheet Download