Service Manuals, User Guides, Schematic Diagrams or docs for : . Electronic Components Datasheets Active components Transistors LGE bf421-423
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BF421/BF423(PNP)
TO-92 Bipolar Transistors
TO-92
1. EMITTER
2. COLLECTOR
3. BASE
Features
Low feedback capacitance.
PNP transistors in a TO-92 plastic package.
NPN complements: BF420 and BF422
Class-B video output stages in colour
television and professional monitor equipment.
Dimensions in inches and (millimeters)
MAXIMUM RATINGS (TA=25 unless otherwise noted)
Symbol Parameter BF421 BF423 Units
VCBO Collector-Base Voltage -300 -250 V
VCEO Collector-Emitter Voltage -300 -250 V
VEBO Emitter-Base Voltage -5 V
IC Collector Current -Continuous -100 mA
PC Collector Power Dissipation 0.625 W
Rth j-a thermal resistance from junction to ambient 150 /W
Tj junction temperature 150
Tstg Storage Temperature Range -65to+150
ELECTRICAL CHARACTERISTICS (Tamb=25 unless otherwise specified)
Parameter Symbol Test conditions MIN MAX UNIT
Collector-base breakdown voltage BF421 -300
V(BR)CBO IC=--100A, IE=0 V
BF423 -250
Collector-emitter breakdown voltage BF421 -300
V(BR)CEO IC= -1mA , IB=0 V
BF423 -250
Emitter-base breakdown voltage V(BR)EBO IE=-100A, IC=0 -5 V
Collector cut-off current ICBO VCB=-200 V , IE=0 -0.01 A
Emitter cut-off current BF421 -0.1
IEBO VEB=-5V , IC=0 A
BF423 -0.05
DC current gain
hFE VCE=-20V, IC=-25mA 50
Collector-emitter saturation voltage BF421 IC=-20mA, IB=-2mA
VCE(sat) -0.6 V
BF423 IC=-30mA, IB=-5mA
VCE=-10V, IC=-10mA
Transition frequency fT 60 MHz
f = 100MHz
Feedback capacitance Cre VCE=-30V,IC=0,f=1MHz 1.6 pF
BF421/BF423(PNP)
TO-92 Bipolar Transistors
BF421/BF423(PNP)
TO-92 Bipolar Transistors
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