This part is a kind of semiconductor called 2SK1471.

Function of this product has N-Channel Silicon MOSFET.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN3772A Features · Low ON resistance. · Ultrahigh-speed switching. · Low-voltage drive. N-Channel Silicon MOSFET 2SK1471 Ultrahigh-Speed Switching Applications Package Dimensions unit:mm 2083B [2SK1471] 6.5 5.0 4 2.3 0.5 5.5 1.5 7.0 unit:mm 2092B 0.85 0.7 0.6 123 2.3 2.3 0.8 1.6 7.5 1.2 0.5 1 : Gate 2 : Drain 3 : Source SANYO : TP [2SK1471] 6.5 2.3 5.0 0.5 4 0.8 5.5 1.5 2.5 7.0 1.2 0.85 1 0.6 2 3 2.3 2.3 0.5 1.2 0 to 0.2 1 : Gate 2 : Drain 3 : Source 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 r [ ... ]

2SK1471 PDF Datasheet Download