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                                                                                       BUX48
                                                                                      BUX48A

                             High voltage fast-switching NPN power transistors

Features
   NPN transistors
   High voltage capability
   High current capability
   Fast switching speed

Applications                                                              1
                                                                               2
   Switching mode power supplies
                                                                              TO-3
   Flyback and forward single transistor low power
   converters

                                                         Figure 1.   Internal schematic diagram
Description
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
                                                                                         tray
           BUX48A                   BUX48A                       TO-3




November 2007                                        Rev 1                                            1/9
                                                                                                www.st.com   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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