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                             High voltage fast-switching NPN power transistors

   NPN transistors
   High voltage capability
   High current capability
   Fast switching speed

Applications                                                              1
   Switching mode power supplies
   Flyback and forward single transistor low power

                                                         Figure 1.   Internal schematic diagram
The BUX48 and BUX48A are multi epitaxial mesa
NPN transistors mounted in TO-3 metal can.
They are intended for switching and industrial
applications for single and three-phase mains.

Table 1.     Device summary
       Order code                   Marking                    Package                Packaging

           BUX48                    BUX48                        TO-3
           BUX48A                   BUX48A                       TO-3

November 2007                                        Rev 1                                            1/9
Absolute maximum ratings                                                                        BUX48 BUX48A

1         Absolute maximum ratings

          Table 2.        Absolute maximum ratings
                                                                                        Value            Unit
           Symbol                             Parameter
                                                                                 BUX48        BUX48A     Unit

             VCER       Collector-emitter voltage (RBE = 10)                      850           1000      V
             VCES       Collector-emitter voltage (VBE = 0)                       850           1000      V
            VCEO        Collector-emitter voltage (IB = 0)                        400           450       V
             VEBO       Emitter-base voltage (IC = 0)                                     7               V
              IC        Collector current                                                15               A
              ICM       Collector peak current                                           30               A
              ICP       Collector peak current non repetitive (tp < 20 

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