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bu505


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                                                                                          BU505
                                                       High Voltage NPN Multiepitaxial
                                                             Fast-Switching Transistor
Features
   HIGH VOLTAGE CAPABILITY
   VERY HIGH SWITCHING SPEED
   HIGH RUGGEDNESS

Applications
   ELECTRONIC BALLASTS FOR
                                                                                      3
   FLUORESCENT LIGHTING                                                           2
                                                                              1
   SWITCH MODE POWER SUPPLIES
                                                                     TO-220
Description
The BU505 is a High Voltage NPN fastswitching
transistor designed to be used in lighting
application, like electronic ballast for fluorescent   Internal Schematic Diagram
lamps.
It's characteristics make also ideal for power
supplies.




Order Codes

       Part Number                  Marking                Package                Packing

          BU505                      BU505                 TO-220                     TUBE




                                                                                                  rev.4
August 2005                                                                                       1/10
                                                                                             www.st.com   10
1 Absolute Maximum Ratings                                                            BU505

1             Absolute Maximum Ratings

Table 1.       Absolute Maximum Rating
  Symbol                                   Parameter                       Value       Unit
    VCES       Collector-Emitter Voltage (VBE = 0)                         1500         V
    VCEO       Collector-Emitter Voltage (IB = 0)                           700         V
       IC      Collector Current                                            2.5         A
       ICM     Collector Peak Current (tP < 5ms)                             4          A
       IB      Base Current                                                  1          A
       IBM     Base Peak Current (tP < 5ms)                                  2          A
    PTOT       Total dissipation at Tc = 25



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