This part is a kind of semiconductor called BDX88C.
Function of this product has SILICON POWER TRANSISTOR.
Manufacturers : SavantIC
Image and pinout :

Some of the text within the PDF file :
SavantIC Semiconductor Product Specification Silicon PNP Power Transistors BDX88C DESCRIPTION ·With TO-3 package ·Complement to type BDX87C ·DARLINGTON APPLICATIONS ·Designed for use in power linear and switching application. PINNING (See Fig.2) PIN 1 2 3 Base Emitter Fig.1 simplified outline (TO-3) and symbol Collector DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC ICM IB PT Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector current(peak) Base current Total power dissipation Max. operating Junction temperature Storage temperature TC=25 CONDITIONS Open emitter Open base Open collector VALUE -100 -100 -5 -12 -18 -0.2 120 200 -65~200 UNIT V V V A A A W THERMAL CHARACTERISTIC [ ... ]
BDX88C PDF Datasheet Download
