PT851 Datasheet and Replacement

   Type Designator: PT851
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 0.8 W
   Maximum Collector-Base Voltage |Vcb|: 45 V
   Maximum Collector-Emitter Voltage |Vce|: 20 V
   Maximum Collector Current |Ic max|: 0.5 A
   Max. Operating Junction Temperature (Tj): 175 °C
   Transition Frequency (ft): 90 MHz
   Collector Capacitance (Cc): 27 pF
   Forward Current Transfer Ratio (hFE), MIN: 40
   Noise Figure, dB: -
   Package: TO5
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