Low-Voltage Power Bipolar Transistor from STMicroelectronics Offers High Gain, Low Saturation Voltage

    GENEVA--Aug. 7, 2002--

Two versions of NPN power transistor serve in a wide range of applications
    STMicroelectronics today announced the STSA851 and STN851, two versions of a low-voltage power bipolar transistor that features high current-gain characteristics, very low collector-to-emitter saturation voltage, and fast switching speed.
    Both versions are aimed at emergency lighting and automotive applications, but serve equally well in voltage regulation; cold-cathode fluorescent lighting systems; alarm systems; high-efficiency low-voltage switching power supplies; and as relay drivers.
    Of the two devices, the STSA851 comes in a TO-92 package and is rated for 1.1 W of total power at 25(Degree)C ambient temperature. The STN851 comes in a SOT-223 and is rated for 1.6W. Both devices are manufactured using NPN planar technology and feature a base island layout that contributes to their exceptionally high gain and very low saturation voltage bringing cost and size reduction (same electrical performance with 30% silicon less) but keeping a high level of efficiency.

	   Main Electrical Characteristics:

P/N       Vces (V)    Vcesat  (mV)      Hfe (A)           Package
                    Ic=5A Ib=200mA    Ic=5A Vce=1V

STSA851    150      (Less than)450   (Greater than)90    TO-92(a)

STN851     150      (Less than)450   (Greater than)90    SOT-223

(a) Also available in Ammopak (STSA851-AP)

    About STMicroelectronics

    STMicroelectronics, the world's third largest semiconductor company, is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence markets. The Company's shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2001, the Company's net revenues were $6.36 billion and net earnings were $257.1 million. Further information on ST can be found at www.st.com.