This part is a kind of semiconductor called BC640-16.
Function of this product has PNP medium power transistors.
Manufacturers : NXP
Image and pinout :

Some of the text within the PDF file :
DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage M3D186 BC636; BC638; BC640 PNP medium power transistors Product specification Supersedes data of 1997 Mar 07 1999 Apr 23 Philips Semiconductors Product specification PNP medium power transistors FEATURES • High current (max. 1 A) • Low voltage (max. 80 V). APPLICATIONS • Audio and video amplifiers. DESCRIPTION PNP medium power transistor in a TO-92; SOT54 plastic package. NP complements: BC635, BC637 and BC639. 1 handbook, halfpage BC636; BC638; BC640 PINNING PIN 1 2 3 base collector emitter DESCRIPTION 2 3 2 1 3 MAM285 Fig.1 Simplified outline (TO-92; SOT54) and symbol. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VCBO BC636 BC638 BC640 VCEO collector-emitter voltage BC636 BC6 [ ... ]
BC640-16 PDF Datasheet Download
