TK21B Datasheet and Replacement

   Type Designator: TK21B
   Material of Transistor: Ge
   Polarity: PNP
   Maximum Collector Power Dissipation (Pc): 0.2 W
   Maximum Collector-Base Voltage |Vcb|: 30 V
   Maximum Collector-Emitter Voltage |Vce|: 20 V
   Maximum Emitter-Base Voltage |Veb|: 30 V
   Maximum Collector Current |Ic max|: 0.1 A
   Max. Operating Junction Temperature (Tj): 75 °C
   Transition Frequency (ft): 1 MHz
   Forward Current Transfer Ratio (hFE), MIN: 15
   Noise Figure, dB: -
   Package: X18
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