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                                                                                         STN951

                                 Low voltage fast-switching PNP power transistor

Features
    Very low collector-emitter saturation voltage
    High current gain characteristic                                  4
    Fast switching speed
    Surface mounting device in medium power                                              3
    SOT-223 package                                                                  2
                                                                                1

Applications                                                               SOT-223
    Emergency lighting
    Voltage regulators
    Relay drivers
    High efficiency low voltage switching
                                                        Figure 1.   Internal schematic diagram
    applications

Description
The device is manufactured in PNP planar
technology by using a "Base Island" layout. The
resulting transistor shows exceptional high gain
performances coupled with very low saturation
voltage.




Table 1.       Device summary
   Order codes           Marking                    Package                      Packaging

     STN951               N951                      SOT-223                     Tape and reel




October 2008                                        Rev 3                                             1/8
                                                                                                www.st.com   8
                                                                                                        STN951


Contents
1     Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2     Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3     Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4     Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7




2/8
STN951                                                                Electrical ratings


1        Electrical ratings

         Table 2.     Absolute maximum rating
          Symbol                            Parameter               Value         Unit

           VCBO     Collector-base voltage (IE = 0)                  -60           V
           VCEO     Collector-emitter voltage (IB = 0)               -60           V
           VEBO     Emitter-base voltage (IC = 0)                    -6            V

             IC     Collector current                                -5            A
            ICM     Collector peak current (tP < 5 ms)               -10           A
             IB     Base current                                     -1            A
            IBM     Base peak current (tP < 5 ms)                    -2            A

            Ptot    Total dissipation at Tamb = 25 

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