K4-525 Datasheet and Replacement

   Type Designator: K4-525
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 50 W
   Maximum Collector-Base Voltage |Vcb|: 60 V
   Maximum Collector-Emitter Voltage |Vce|: 45 V
   Maximum Emitter-Base Voltage |Veb|: 9 V
   Maximum Collector Current |Ic max|: 4 A
   Max. Operating Junction Temperature (Tj): 175 °C
   Transition Frequency (ft): 0.6 MHz
   Forward Current Transfer Ratio (hFE), MIN: 20
   Noise Figure, dB: -
   Package: TO3
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