This part is a kind of semiconductor called B645.

Function of this product has 2SB645.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor wSwiwl.iDcatoaSnheePt4NU.cPomPower Transistors DESCRIPTION ·With TO-3 package ·High power dissipation APPLICATIONS ·For power switching and general purpose applications PINNING(see Fig.2) PIN DESCRIPTION 1 Base 2 Emitter 3 Collector Product Specification 2SB645 Fig.1 simplified outline (TO-3) and symbol Absolute maximum ratings(Ta= ) SYMBOL PARAMETER VCBO Collector-base voltage VCEO Collector-emitter voltage VEBO IC Emitter-base voltage Collector current IB Base current PC Collector power dissipation Tj Junction temperature Tstg Storage temperature CONDITIONS Open emitter Open base Open collector TC=25 VALUE -200 -200 -5 -15 -5 150 150 -65~150 UNIT V V V A A W SavantIC Semiconductor Silicon PNP Power Transistors Product Speci [ ... ]

B645 PDF Datasheet Download