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Datasheet BF257 Equivalent ( PDF ) |
N.º | Número de pieza | Descripción | Fabricantes | |
6 | BF257 | NPN SILICON HIGH VOLTAGE TRANSISTORS Continental Device India Limited
An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company
NPN SILICON HIGH VOLTAGE TRANSISTORS
BF257, BF 258, BF259
TO-39 Metal Can Package
INTENDED FOR VIDEO OUTPUT STAGES IN BLACK AND WHITE AND IN COLOUR TELEVISION REVEIVERS.
ABSOLUTE MAXIMUM RATINGS (Ta=25ºC u |
CDIL |
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5 | BF257 | Bipolar NPN Device BF257
Dimensions in mm (inches).
8.51 (0.34) 9.40 (0.37)
7.75 (0.305) 8.51 (0.335)
6.10 (0.240) 6.60 (0.260)
12.70 (0.500)
min.
(00.0.8395)max.
0.41 (0.016) 0.53 (0.021)
dia.
5.08 (0.200) typ.
0.74 (0.029) 1.14 (0.045)
0.71 (0.028) 0.86 (0.034)
2 13
45°
2.54 (0.100)
1 – Emitter
TO39 (TO |
Seme LAB |
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4 | BF257 | HIGH VOLTAGE TRANSISTOR MAXIMUM RATINGS
Rating
Collector-Emitter Voltage
Collector-Emitter Voltage
Collector-Base Voltage
Emitter-Base Voltage
Collector Current - Continuous
@TaTotal Device Dissipation
= 25°C
Derate above 25°C
Total Device Dissipation @Tq = 25°C
Derate above 25°C
Operating and Storage Junctio |
Motorola Semiconductors |
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3 | BF257 | HIGH VOLTAGE VIDEO AMPLIFIERS BF257 BF258-BF259
HIGH VOLTAGE VIDEO AMPLIFIERS
DESCRIPTION The BF257, BF258 and BF259 are silicon planar epitaxial NPN transistors in Jedec TO-39 metal case. They are particularly designed for videooutput stages in CTV and MTV sets, class A audio output stages and drivers for horizontal deflection |
STMicroelectronics |
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Número de pieza | Descripción | Fabricantes | |
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