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                                                                                                       BST39,BST40


    TRANSISTOR (NPN)
                                                                                     SOT-89-3L


    FEATURES
       Low Current                                                                   1. BASE
       High Voltage
                                                                                     2. COLLECTOR
    APPLICATIONS
       General Purpose Switching and Amplification                                   3. EMITTER


    MARKING:BCT39:AT1
            BCT40:AT2




    MAXIMUM RATINGS (Ta=25 unless otherwise noted)

      Symbol                          Parameter                         Value            Unit
                                                BST39                      400
        VCBO      Collector-Base Voltage                                                  V
                                                BST40                      300
                  Collector-Emitter Voltage     BST39                      350
        VCEO                                                                              V
                                                BST40                      250
        VEBO      Emitter-Base Voltage                                       5            V
         IC       Collector Current                                        100           mA
         PC       Collector Power Dissipation                              500           mW
        RJA       Thermal Resistance From Junction To Ambient              250           /W
         Tj       Junction Temperature                                     150            
        Tstg      Storage Temperature                                 -55~+150            


    ELECTRICAL CHARACTERISTICS (Ta=25 unless otherwise specified)

               Parameter                          Symbol       Test   conditions                Min   Typ             Max        Unit
                                                                                 BST39          400
     Collector-base breakdown voltage             V(BR)CBO   IC=100

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