This part is a kind of semiconductor called BC546.

Function of this product has NPN general purpose transistors.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage M3D186 BC546; BC547 NPN general purpose transistors Product specification Supersedes data of 1999 Apr 15 2004 Nov 25 Philips Semiconductors NPN general purpose transistors Product specification BC546; BC547 FEATURES • Low current (max. 100 mA) • Low voltage (max. 65 V). APPLICATIONS • General purpose switching and amplification. DESCRIPTION NPN transistor in a TO-92; SOT54 plastic package. PNP complements: BC556 and BC557. PINNING PIN 1 2 3 emitter base collector DESCRIPTION handbook, halfpage1 2 3 2 MAM182 Fig.1 Simplified outline (TO-92; SOT54) and symbol. 3 1 ORDERING INFORMATION TYPE NUMBER BC546A BC546B BC547 BC547B BC547C NAME SC-43A PACKAGE DESCRIPTION plastic single-ended leaded (through hole) package; 3 lea [ ... ]

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