This part is a kind of semiconductor called A1643.

Function of this product has 2SA1643.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon PNP Power Transistors 2SA1643 DESCRIPTION ·With TO-220F package ·Complement to type 2SC4327 ·Low collector saturation voltage APPLICATIONS ·For power switching applications PINNING PIN 1 2 3 Base Collector Emitter Fig.1 simplified outline (TO-220F) and symbol DESCRIPTION Absolute maximum ratings (Ta=25 ) SYMBOL VCBO VCEO VEBO IC PC Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector dissipation Junction temperature Storage temperature TC=25 CONDITIONS Open emitter Open base Open collector VALUE -50 -35 -7 -7 25 150 -55~150 UNIT V V V A W SavantIC Semiconductor Product Specification [ ... ]

A1643 PDF Datasheet Download