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                                                                                                            STL73D

                                   High voltage fast-switching NPN power transistor

Features
    High voltage capability
    Low spread of dynamic parameters
    Very high switching speed
    Integrated antiparallel collector-emitter diode

Application
    Electronic ballast for fluorescent lighting
                                                                                               TO-92
Description
The device is manufactured using high voltage                      Figure 1.       Internal schematic diagram
multi-epitaxial planar technology for high
switching speeds and high voltage capability.
It uses a cellular emitter structure with planar
edge termination to enhance switching speeds
while maintaining the wide RBSOA.
The STL series is designed for use in compact
fluorescent lamps.




Table 1.       Device summary
   Order codes            Marking (1)                        Package                                  Packaging

                             L73DL
     STL73D                                                    TO-92                                      Bag
                             L73DH
                             L73DL
   STL73D-AP                                                   TO-92                                  Ammopack
                             L73DH
1. The product is classified in DC current gain group L and group H, see Table 5: hFE classification. STMicroelectronics
   reserves the right to ship from any group according to production availability.


November 2009                                        Doc ID 15147 Rev 2                                                     1/9
                                                                                                                      www.st.com   9
Electrical ratings                                                                      STL73D


1           Electrical ratings

            Table 2.     Absolute maximum ratings
             Symbol                            Parameter                     Value        Unit

               VCES    Collector-emitter voltage (VBE = 0)                    700          V
               VCEO    Collector-emitter voltage (IB = 0)                     400          V
                       Emitter-base voltage
               VEBO                                                        V(BR)EBO        V
                       (IC = 0, IB = 0.5 A, tP < 10 

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