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                                                                                                 BUL128D(NPN)
                                                                                                     TO-220 Transistor

                                                                                                            TO-220
                                                             1.BASE

                                                             2.COLLECTOR

                                                             3.EMITTER

                                             3
                                         2
                                     1
Features
     ELECTRONIC BALLASTS FOR FLUORESCENT LIGHTING
     FLYBACK AND FORWARD SINGLE TRANSISTOR LOW POWER
     CONVERTERS
MAXIMUM RATINGS (TA=25 unless otherwise noted)
 Symbol     Parameter                                                    Value         Units
  VCBO      Collector-Base Voltage                                        700            V
                                                                                               Dimensions in inches and (millimeters)
  VCEO      Collector-Emitter Voltage                                     400            V
  VEBO      Emitter-Base Voltage                                             9           V
    IC      Collector Current -Continuous                                    4           A
   PC       Collector Power Dissipation                                      2          W
Rthj-case   Thermal Resistance Junction-Case Max                          1.78         /W
Rthj-amb    Thermal Resistance Junction-Ambient Max                       62.5         /W
    Tj      Junction Temperature                                          150           
   Tstg     Storage Temperature Range                                    -55-150        

ELECTRICAL CHARACTERISTICS (Tamb=25 unless otherwise specified)
             Parameter                                Symbol          Test       conditions    MIN      TYP       MAX      UNIT

Collector-base breakdown voltage                 V(BR)CBO         IC= 1mA,IE=0                 700                           V
Collector-emitter Sustaining voltage             VCEO(SUS)        IC= 100mA,L=25mH             400                           V
Emitter-base breakdown voltage                   V(BR)EBO         IE= 10mA,IC=0                  9                           V
Collector cut-off current                             ICBO        VCE= 400V, IE=0                                  0.1      mA
Collector Cut-off Current                        ICES             VBE = -1.5 V, VCE = 700 V                        0.1      mA
Emitter cut-off current                               IEBO        VEB=7V, IC=0                                     50       

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