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The BC547 is a NPN bipolar junction transistor (BJT) with a maximum current gain of 800. It is commonly used in general-purpose low-power amplifying or switching applications. Features: Low current (max. 100 mA) Low voltage (max. 45 V) High current gain (min. 800) High frequency (max. 300 MHz) Low noise High stability Applications: Amplifiers Switches Audio amplifiers Radio frequency (RF) amplifiers Pulse generation Timer circuits Logic circuits (For reference only)