This part is a kind of semiconductor called BC107.
Function of this product has NPN general purpose transistors.
Manufacturers : Philips
Image and pinout :

Some of the text within the PDF file :
DISCRETE SEMICONDUCTORS DATA SHEET M3D125 BC107; BC108; BC109 NPN general purpose transistors Product specification Supersedes data of 1997 Jun 03 File under Discrete Semiconductors, SC04 1997 Sep 03 Philips Semiconductors Product specification NPN general purpose transistors FEATURES • Low current (max. 100 mA) • Low voltage (max. 45 V). APPLICATIONS • General purpose switching and amplification. DESCRIPTION NPN transistor in a TO-18; SOT18 metal package. PNP complement: BC177. 3 BC107; BC108; BC109 PINNING PIN 1 2 3 emitter base collector, connected to the case DESCRIPTION handbook, halfpage 1 3 2 MAM264 2 1 Fig.1 Simplified outline (TO-18; SOT18) and symbol. QUICK REFERENCE DATA SYMBOL VCBO PARAMETER collector-base voltage BC107 BC108; BC109 VCEO collector-emitter [ ... ]
BC107 PDF Datasheet Download
