MQ3905 Datasheet and Replacement

   Type Designator: MQ3905
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 0.31 W
   Maximum Collector-Base Voltage |Vcb|: 40 V
   Maximum Collector-Emitter Voltage |Vce|: 40 V
   Maximum Emitter-Base Voltage |Veb|: 6 V
   Maximum Collector Current |Ic max|: 0.2 A
   Max. Operating Junction Temperature (Tj): 135 °C
   Transition Frequency (ft): 250 MHz
   Collector Capacitance (Cc): 4 pF
   Forward Current Transfer Ratio (hFE), MIN: 50
   Noise Figure, dB: -
   Package: TO86
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