This part is a kind of semiconductor called A1598.

Function of this product has 2SA1598.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Silicon PNP Power Transistors DESCRIPTION ·With ITO-220 package ·Switching power transistor ·Low collector saturation voltage PINNING PIN DESCRIPTION 1 Base 2 Collector 3 Emitter Product Specification 2SA1598 Fig.1 simplified outline (ITO-220) and symbol Absolute maximum ratings(Ta=25 ) SYMBOL PARAMETER VCBO Collector-base voltage VCEO Collector-emitter voltage VEBO IC Emitter-base voltage Collector current ICM Collector current-Peak IB Base current IBM Base current-Peak PT Total power dissipation Tj Junction temperature Tstg Storage temperature CONDITIONS Open emitter Open base Open collector TC=25 THERMAL CHARACTERISTICS SYMBOL PARAMETER Rth j-C Thermal resistance junction case VALUE -60 -40 -7 -7 -14 -1.5 -2 25 150 [ ... ]

A1598 PDF Datasheet Download