BUF644 Datasheet and Replacement

   Type Designator: BUF644
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 70 W
   Maximum Collector-Base Voltage |Vcb|: 500 V
   Maximum Collector-Emitter Voltage |Vce|: 400 V
   Maximum Emitter-Base Voltage |Veb|: 9 V
   Maximum Collector Current |Ic max|: 12 A
   Max. Operating Junction Temperature (Tj): 150 °C
   Forward Current Transfer Ratio (hFE), MIN: 15
   Noise Figure, dB: -
   Package: TO220
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