This part is a kind of semiconductor called 2SA1346.

Function of this product has PNP/NPN Epitaxial Planar Silicon Transistors.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

Ordering number : EN 1288C 2SA1346/2SC3400 PNP/NPN Epitaxial Planar Silicon Transistors Switching Applications (with Bias Resistance) [ ... ]

2SA1346 PDF Datasheet Download