3DK21 Datasheet and Replacement

   Type Designator: 3DK21
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 350 W
   Maximum Collector-Base Voltage |Vcb|: 250 V
   Maximum Collector-Emitter Voltage |Vce|: 200 V
   Maximum Emitter-Base Voltage |Veb|: 7 V
   Maximum Collector Current |Ic max|: 40 A
   Max. Operating Junction Temperature (Tj): 175 °C
   Transition Frequency (ft): 8 MHz
   Forward Current Transfer Ratio (hFE), MIN: 10
   Noise Figure, dB: -
   Package: TO3
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