This part is a kind of semiconductor called 2N3903.
Function of this product has NPN General Purpose Amplifier.
Manufacturers : Fairchild Semiconductor
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Some of the text within the PDF file :
2N3903 Discrete POWER & Signal Technologies 2N3903 C BE TO-92 NPN General Purpose Amplifier This device is designed for use as general purpose amplifiers and switches requiring collector currents to 100 mA. Sourced from Process 23. See 2N3904 for characteristics. Absolute Maximum Ratings* Symbol VCEO VCBO VEBO IC TJ, Tstg Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current - Continuous TA = 25°C unless otherwise noted Parameter Value 40 60 6.0 200 -55 to +150 Units V V V mA °C Operating and Storage Junction Temperature Range *These ratings are limiting values above which the serviceability of any semiconductor device may be impaired. NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C. 2) These are steady s [ ... ]
2N3903 PDF Datasheet Download
