BF420 KOOCHIN | Alldatasheet
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Technical content
B F 4 2 0 TRANSISTOR (NPN) BF422
FEATURES
z Low feedback capacitance. z NPN transistors in a TO-92 plastic package. PNP complements: BF421 and BF423 z Class-B video output stages in colour television and professional monitor equipment. MAXIMUM RATINGS (TA=25℃ unless otherwise noted) Symbol Parameter BF420 BF422 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 0.83 W Rth j-a thermal resistance from junction to ambient 150 ℃/W Tj junction temperature 150 ℃ Tstg Storage Temperature Range -65to150 ℃ ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless otherwise specified) P a r a m e t e r S y m b o l T e s t c o n d i t i o n s M I N M A X U N I T Collector-base breakdown voltage BF420 B F 4 2 2 V(BR)CBO IC=100μA, IE=0 300 250 V Collector-emitter breakdown voltage BF420 B F 4 2 2 V (BR)CEO IC= 1mA , IB=0 300 250 V Emitter-base breakdown voltage V(BR)EBO IE=100μA, IC=0 5 V Collector cut-off current ICBO V CB=200V, IE=0 0.01 μA Emitter cut-off current IEBO V EB=5V, IC=0 0.05 μA D C c u r r e n t g a i n hFE VCE=20V, IC=25mA 50 Collector-emitter saturation voltage VCE(sat) I C=30mA, IB= 5mA 0.6 V Transition frequency f T VCE=10V, IC= 10mA f=100MHz
60 MHz
Feedback capacitance Cre V CE=30V,IC=0,f=1MHz 1.6 pF 1 2 3 TO-92 1. EMITTER 2.COLLECTOR 3. BASE