The maximum operating temperature range for the BC548B is -55°C to 150°C.
Yes, the BC548B can be used as a switch, but it's not recommended for high-frequency switching applications due to its relatively low transition frequency (ft) of 150 MHz.
The choice of resistor values depends on the specific application and the desired current gain. A general rule of thumb is to choose a base resistor (Rb) that limits the base current to 1-5% of the collector current, and a collector resistor (Rc) that sets the desired collector voltage.
The maximum collector current that the BC548B can handle is 100 mA.
The BC548B has a maximum collector-emitter voltage (Vceo) of 30V, so it's not suitable for high-voltage applications. If you need a transistor for high-voltage applications, consider using a different part with a higher voltage rating.
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