The requested file:
https://pdf.datasheetcatalog.com/datasheet_pdf/general-semiconductor/BC546A_to_BC549C.pdf
is the data sheet for the following electronic components:

General Semiconductor

#	Part Name	Description
1	BC546A	Small Signal Transistor (NPN)
2	BC546B	Small Signal Transistor (NPN)
3	BC546C	Small Signal Transistor (NPN)
4	BC547A	Small Signal Transistor (NPN)
5	BC547B	Small Signal Transistor (NPN)
6	BC547C	Small Signal Transistor (NPN)
7	BC548A	Small Signal Transistor (NPN)
8	BC548B	Small Signal Transistor (NPN)
9	BC548C	Small Signal Transistor (NPN)
10	BC549A	Small Signal Transistor (NPN)
11	BC549B	Small Signal Transistor (NPN)
12	BC549C	Small Signal Transistor (NPN)

Select the part name and then you can download the datasheet in PDF format.