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BF259

P1-P3P4-P5
BF257
BF258-BF259
October 1988
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 designedfor videooutput
stages in CTV and MTV sets, class A audio output
stages and drivers for horizontal deflection circuits.
ABSOLUTE MAXIMUM RATINGS
Value
Symbol Parameter
BF257 BF258 BF259
Unit
V
CBO
Collector-base Voltage (I
E
= 0) 160 250 300 V
V
CEO
Collector-emitter Voltage (I
B
= 0) 160 250 300 V
V
EBO
Emitter-base Voltage (I
C
=0) 5 V
I
C
Collector Current 100 mA
I
CM
Collector Peak Current 200 mA
P
tot
Total Power Dissipation at T
amb
≤ 50 °C5W
T
stg
Storage Temperature – 55 to 200 °C
T
j
Junction Temperature 200 °C
INTERNAL SCHEMATIC DIAGRAM
TO-39
1/5
ELECTRICAL CHARACTERISTICS (T
amb
=25°C unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
CBO
Collector Cutoff Current
(I
E
=0)
for BF257
for BF258
for BF259
V
CB
= 100 V
V
CB
= 200 V
V
CB
= 250 V
50
50
50
nA
nA
nA
V
(BR) CBO
Collector-base
Breakdown Voltage
(I
E
=0)
I
C
=100µA
for BF257
for BF258
for BF259
160
250
300
V
V
V
V
(BR)CEO
* Collector-emitter
Breakdown Voltage
(I
B
=0)
I
C
=10mA
for BF257
for BF258
for BF259
160
250
300
V
V
V
V
(BR) EBO
Emittter-base
Breakdown Voltage
(I
C
=0)
I
E
=100µA5 V
V
CE (sat)
* Collector-emitter
Saturation Voltage
I
C
=30mA I
B
=6mA 1 V
h
FE
* DC Current Gain I
C
=30mA V
CE
=10V 25
f
T
Transition Frequency I
C
=15mA V
CE
=10V 90 MHz
C
re
Reverse Capacitance I
C
=0
f=1MHz
V
CE
=30V
3pF
* Pulsed : pulse duration = 300 µs, duty cycle = 1 %.
DC Current Gain.
THERMAL DATA
R
th j-case
R
th j-amb
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Max
Max
30
175
°C/W
°C/W
BF257-BF258-BF259
2/5
Collector Cutoff Current. Collector-base Capacitance.
Transition Frequency. Power Rating Chart.
Safe Operating Area.
BF257-BF258-BF259
3/5
P1-P3P4-P5

BF259

Mfr. #:
Buy BF259
Manufacturer:
STMicroelectronics
Description:
TRANS NPN 300V 0.1A TO-39
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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