PT657 Datasheet and Replacement

   Type Designator: PT657
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 25 W
   Maximum Collector-Base Voltage |Vcb|: 100 V
   Maximum Collector-Emitter Voltage |Vce|: 80 V
   Maximum Collector Current |Ic max|: 1.2 A
   Max. Operating Junction Temperature (Tj): 200 °C
   Transition Frequency (ft): 140 MHz
   Collector Capacitance (Cc): 30 pF
   Forward Current Transfer Ratio (hFE), MIN: 15
   Noise Figure, dB: -
   Package: TO61
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