HDA420 Datasheet and Replacement

   Type Designator: HDA420
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 0.5 W
   Maximum Collector-Base Voltage |Vcb|: 40 V
   Maximum Collector-Emitter Voltage |Vce|: 25 V
   Maximum Collector Current |Ic max|: 0.15 A
   Max. Operating Junction Temperature (Tj): 150 °C
   Transition Frequency (ft): 1000 MHz
   Collector Capacitance (Cc): 4 pF
   Forward Current Transfer Ratio (hFE), MIN: 25
   Noise Figure, dB: -
   Package: TO122
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