Philips bf421 DATASHEETS
DISCRETE SEMICONDUCTORS
DATA SH EET
ook, halfpage
M3D186
BF421; BF423
PNP high-voltage transistors
Product specification
Supersedes data of September 1994
File under Discrete Semiconductors, SC04
1996 Dec 09
Philips Semiconductors Product specification
PNP high-voltage transistors BF421; BF423
FEATURES
• Low feedback capacitance.
PINNING
PIN DESCRIPTION
1 base
APPLICATIONS
• Class-B video output stages in colour television and
2 collector
3 emitter
professional monitor equipment.
DESCRIPTION
PNP transistors in a TO-92 plastic package.
NPN complements: BF420 and BF422.
handbook, halfpage
1
2
3
1
MAM285
Fig.1 Simplified outline (TO-92) and symbol.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
CBO
collector-base voltage open emitter
BF421 −−300 V
BF423 −−250 V
V
CEO
collector-emitter voltage open base
BF421 −−300 V
BF423 −−250 V
I
P
h
C
f
CM
tot
FE
re
T
peak collector current −−100 mA
total power dissipation T
≤ 25 °C − 830 mW
amb
DC current gain IC= −25 mA; VCE= −20 V 50 −
feedback capacitance IC=ic= 0; VCE= −30 V; f = 1 MHz − 1.6 pF
transition frequency IC= −10 mA; VCE= −10 V; f = 100 MHz 60 − MHz
2
3
1996 Dec 09 2
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