AC558K Datasheet and Replacement

   Type Designator: AC558K
   Material of Transistor: Ge
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 0.35 W
   Maximum Collector-Base Voltage |Vcb|: 25 V
   Maximum Collector-Emitter Voltage |Vce|: 16 V
   Maximum Emitter-Base Voltage |Veb|: 6 V
   Maximum Collector Current |Ic max|: 1 A
   Max. Operating Junction Temperature (Tj): 85 °C
   Transition Frequency (ft): 1 MHz
   Collector Capacitance (Cc): 50 pF
   Forward Current Transfer Ratio (hFE), MIN: 40
   Noise Figure, dB: -
   Package: X04
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