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BF491K Specs and Replacement

   Type Designator: BF491K
   Material of Transistor: Si
   Polarity: PNP

Absolute Maximum Ratings

   Maximum Collector Power Dissipation (Pc): 0.625 W
   Maximum Collector-Base Voltage |Vcb|: 200 V
   Maximum Collector-Emitter Voltage |Vce|: 200 V
   Maximum Emitter-Base Voltage |Veb|: 6 V
   Maximum Collector Current |Ic max|: 0.5 A
   Max. Operating Junction Temperature (Tj): 150 °C

Electrical Characteristics

   Transition Frequency (ft): 50 MHz
   Collector Capacitance (Cc): 1.6 pF
   Forward Current Transfer Ratio (hFE), MIN: 25
   Noise Figure, dB: -
   Package: TO92
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