This part is a kind of semiconductor called BC807-16.
Function of this product has PNP general purpose transistor.
Manufacturers : NXP
Image and pinout :

Some of the text within the PDF file :
DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage M3D088 BC807 PNP general purpose transistor Product specification Supersedes data of 1997 Feb 28 1999 Apr 08 Philips Semiconductors Product specification PNP general purpose transistor FEATURES • High current (max. 500 mA) • Low voltage (max. 45 V). APPLICATIONS • General purpose switching and amplification. DESCRIPTION PNP transistor in a SOT23 plastic package. NPN complements: BC817. 1 BC807 PINNING PIN 1 2 3 base emitter collector DESCRIPTION handbook, halfpage 3 3 MARKING 2 TYPE NUMBER BC807 BC807-16 BC807-25 BC807-40 Note MARKING CODE (1) 5D∗ 5A∗ 5B∗ 5C∗ Top view 1 2 MAM256 Fig.1 Simplified outline (SOT23) and symbol. 1. ∗ = p: Made in Hong Kong. ∗ = t: Made in Malaysia. LIMITING VALUES In accordance [ ... ]
BC807-16 PDF Datasheet Download
