BF257 Datasheet and Replacement

BF257BF258-BF259HIGH VOLTAGE VIDEO AMPLIFIERSDESCRIPTIONThe BF257, BF258 and BF259 are silicon planarepitaxial NPN transistors in Jedec TO-39 metalcase.They are particularly designed for videooutputstages in CTV and MTV sets, class A audio outputstages and drivers for horizontal deflection circuits.TO-39INTERNAL SCHEMATIC DIAGRAMABSOLUTE MAXIMUM RATINGSValueSymbol Para

Continental Device India LimitedAn ISO/TS 16949, ISO 9001 and ISO 14001 Certified CompanyNPN SILICON HIGH VOLTAGE TRANSISTORS BF257, BF 258, BF259TO-39Metal Can PackageINTENDED FOR VIDEO OUTPUT STAGES IN BLACK AND WHITE AND IN COLOUR TELEVISION REVEIVERS.ABSOLUTE MAXIMUM RATINGS (Ta=25C unless specified otherwise)DESCRIPTION SYMBOL BF257 BF258 BF259 UNITSVCEOCollector Emit

BF257DCSMDimensions in mm (inches). Dual Bipolar NPN Devices in a hermetically sealed LCC2 Ceramic Surface Mount Package for High Reliability 1.40 0.152.29 0.20 1.65 0.13(0.055 0.006)(0.09 0.008) (0.065 0.005)Applications 2 314Dual Bipolar NPN Devices. A0.236 5rad. (0.009) V = 160V CEO6.22 0.13 A = 1.27 0.13I = 0.1A C(0.0

BF257CSM4SILICON PLANAR NPN HIGHMECHANICAL DATAVOLTAGE TRANSISTOR IN A Dimensions in mm (inches)CERAMIC SURFACE MOUNTPACKAGE1.40 0.155.59 0.13(0.055 0.006)(0.22 0.005)0.25 0.03(0.01 0.001)0.23rad.(0.009)3 20.234 1min.(0.009)FEATURES High Voltage1.02 0.20 2.03 0.20(0.04 0.008) (0.08 0.008) Ceramic Surface Mount