This part is a kind of semiconductor called BC559C.

Function of this product has Low Noise Transistors.

Manufacturers : Motorola Inc

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Low Noise Transistors Order this document by BC559/D PNP Silicon COLLECTOR 1 2 BASE 3 EMITTER BC559, B, C BC560C MAXIMUM RATINGS Rating Collector – Emitter Voltage Collector – Base Voltage Emitter – Base Voltage Collector Current Continuous Total Device Dissipation @ TA = 25°C Derate above 25°C Total Device Dissipation @ TC = 25°C Derate above 25°C Operating and Storage Junction Temperature Range Symbol VCEO VCBO VEBO IC PD PD TJ, Tstg BC559 –30 –30 –5.0 –100 625 5.0 1.5 12 – 55 to +150 BC560 –45 –50 Unit Vdc Vdc Vdc mAdc mW mW/°C Watt mW/°C °C 1 2 3 CASE 29–04, STYLE 17 TO–92 (TO–226AA) THERMAL CHARACTERISTICS Characteristic Thermal Resistance, Junction to Ambient Thermal Resistance, Junction to Case Symbol [ ... ]

BC559C PDF Datasheet Download