This part is a kind of semiconductor called BC337-40.

Function of this product has Si-Epitaxial PlanarTransistors.

Manufacturers : Diotec Semiconductor

Image and pinout :

Some of the text within the PDF file :

NPN Silicon AF Transistors BC 337 BC 338 High current gain q High collector current q Low collector-emitter saturation voltage q Complementary types: BC 327, BC 328 (PNP) q 2 1 3 Type BC 337 BC 337-16 BC 337-25 BC 337-40 BC 338 BC 338-16 BC 338-25 BC 338-40 Marking – Ordering Code Q62702-C313 Q62702-C313-V3 Q62702-C313-V1 Q62702-C313-V2 Q62702-C314 Q62702-C314-V1 Q62702-C314-V2 Q62702-C314-V3 Pin Configuration 1 2 3 C B E Package1) TO-92 1) For detailed information see chapter Package Outlines. Semiconductor Group 1 5.91 BC 337 BC 338 Maximum Ratings Parameter Collector-emitter voltage Collector-base voltage Emitter-base voltage Collector current Peak collector current Base current Peak base current Total power dissipation, TC = 66 ˚C Junction temperature Storage temperatu [ ... ]

BC337-40 PDF Datasheet Download