View 2sc643a datasheet:

JMnic Product Specification Silicon NPN Power Transistors 2SC643A DESCRIPTION With TO-3 package High voltage,high reliability Low collector saturation voltage APPLICATIONS For color TV horizontal output applications PINNING(see fig.2) PIN DESCRIPTION1 Base 2 EmitterFig.1 simplified outline (TO-3) and symbol 3 CollectorAbsolute maximum ratings(Ta=) SYMBOL PARAMETER CONDITIONS VALUE UNITVCBO Collector-base voltage Open emitter 1500 V VCEO Collector-emitter voltage Open base 700 V VEBO Emitter-base voltage Open collector 5 V IC Collector current 2.5 A PC Collector power dissipation TC=25 50 W Tj Junction temperature 150 Tstg Storage temperature -55~150 JMnic Silicon NPN Power Transistors 2SC643A CHARACTERISTICS Tj=25 unless otherwise specified SYMBOL PARAMETER CONDITIONS MIN TYP. MAX UNITVCEO(SUS) Collect

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