This part is a kind of semiconductor called A1828.

Function of this product has Epitaxial planar type silicon transistor.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

2SA1828/2SC4732 2SA1828 / 2SC4732 No. µ µ 4.5 10.5 1.9 1.2 2.6 1.4 1.0 8.5 1.2 1.6 0.5 123 2.5 2.5 7.5 0.5 2SA1828/2SC4732 µ ∞ µ µ µ µ µ µ µ µ µ µ µ µ µ µ µ µ ° ° ° µ µ µ µ µ µ µ µ µ µ µ µ µ µ µ ° ° ° 2SA1828/2SC4732 µ 2SA1828/2SC4732 ° ° ° ° ° [ ... ]

A1828 PDF Datasheet Download