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 unless specified otherwise)

DESCRIPTION

SYMBOL

BF257

BF258

BF259

UNITS

Collector Emitter Voltage

160

250

300

V

Collector Base Voltage

160

250

300

V

Emitter Base Voltage

<----------------5---------------->

V

Collector Current Continuous

<-------------100--------------->

mA

Peak

<------------300---------------->

mA

Total Power Dissipation @ Ta=25ºC

<------------1.0--------------->

W

Derate Above 25ºC

<---------------6.67------------->

mW/ºC

Total Power Dissipation@ Tc=25ºC

<----------------7---------------->

W

Derate Above 25ºC

<---------------46.67----------->

mW/ºC

Operating And Storage Junction

<---------- -65 to +175------>

ºC

Temperature Range

THERMAL RESISTANCE

Junction to Ambient

<----------------150-------------->

ºC/W

Junction to Case

<----------------21.43----------->

ºC/W

ELECTRICAL CHARACTERISTICS (Ta=25º C unless specified otherwise)

DESCRIPTION

SYMBOL TEST CONDITION

BF257

BF258

BF259

UNITS

Collector Emitter Breakdown Voltage

>160

>250

>300

V

Collector Base Breakdown Voltage

>160

>250

>300

V

Emitter Base Breakdown Voltage

>5

>5

5

V

Collector Cut off Current

<0.05

µA

<0.05

µA

<0.05

µA

DC Current Gain

ALL

>25

Collector Emitter Saturation Voltage

<1

V

DYNAMIC CHARACTERISTICS

Transition Frequency

TYP

f=100MHz

75

MHz

Collector Base Capacitance

TYP

2.5

pF

*Pulse Test: Pulse Width <300

µs, Duty Cycle <2%

Continental Device India Limited

Data Sheet

Page 1 of 3

Continental Device India Limited

An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company