D44U4 Datasheet and Replacement

   Type Designator: D44U4
   Material of Transistor: Si
   Polarity: NPN
   Maximum Collector Power Dissipation (Pc): 31 W
   Maximum Collector-Base Voltage |Vcb|: 250 V
   Maximum Collector-Emitter Voltage |Vce|: 175 V
   Maximum Emitter-Base Voltage |Veb|: 7 V
   Maximum Collector Current |Ic max|: 4 A
   Max. Operating Junction Temperature (Tj): 150 °C
   Transition Frequency (ft): 25 MHz
   Collector Capacitance (Cc): 80 pF
   Forward Current Transfer Ratio (hFE), MIN: 10
   Noise Figure, dB: -
   Package: TO220
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