AC139-4 Datasheet and Replacement

   Type Designator: AC139-4
   Material of Transistor: Ge
   Polarity: PNP
   Maximum Collector Power Dissipation (Pc): 0.72 W
   Maximum Collector-Base Voltage |Vcb|: 32 V
   Maximum Collector-Emitter Voltage |Vce|: 20 V
   Maximum Emitter-Base Voltage |Veb|: 10 V
   Maximum Collector Current |Ic max|: 1.2 A
   Max. Operating Junction Temperature (Tj): 90 °C
   Transition Frequency (ft): 1 MHz
   Collector Capacitance (Cc): 80 pF
   Forward Current Transfer Ratio (hFE), MIN: 40
   Noise Figure, dB: -
   Package: TO1
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