This part is a kind of semiconductor called 2N6520.
Function of this product has High Voltage Transistor 625mW.
Manufacturers : Micro Commercial Components
Image and pinout :
Some of the text within the PDF file :
MCC Features omponents 21201 Itasca Street Chatsworth !"# $ % !"# NPN 2N6515, 2N6517 PNP 2N6519, 2N6520 High Voltage Transistor 625mW l Through Hole Package l 150oC Junction Temperature l Voltage and Current are negative for PNP transistors Pin Configuration Bottom View C B E TO-92 Mechanical Data l Case: TO-92, Molded Plastic l Polarity: indicated as above. A E B Maximum Ratings @ 25oC Unless Otherwise Specified Charateristic 2N6515 2N6519 2N6517, 2N6520 Collector-Base Voltage 2N6515 2N6519 2N6517, 2N6520 Emitter-Base Voltage 2N6515-6517 2N6519-6520 Base Current Collector Current(DC) Power Dissipation@TA=25 C Power Dissipation@TC=25o C Thermal Resistance, Junction to Ambient Air Thermal Resistance, Junction to Case [ ... ]