This part is a kind of semiconductor called A1772.

Function of this product has 2SA1772.

Manufacturers : Sanyo

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN3398A Features · Large current capacity (IC=1A). · High breakdown votlage (VCEO≥400V). 2SA1772 : PNP Epitaxial Planar Silicon Transistor 2SC4615 : NPN Triple Diffused Planar Silicon Transistor 2SA1772/2SC4615 High-Voltage Driver Applications Package Dimensions unit:mm 2045B [2SA1772/2SC4615] unit:mm 2044B 1 : Base 2 : Collector 3 : Emitter 4 : Collector SANYO : TP [2SA1772/2SC4615] 1 : Base 2 : Collector 3 : Emitter 4 : Collector SANYO : TP-FA Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or ma [ ... ]

A1772 PDF Datasheet Download