DOWNLOAD BC558 DATASHEET PDF

In the below GIF you can notice the transistor being switched for a low voltage 1v audio signal. As discussed a transistor will act as an Open switch during Forward Bias and as a closed switch during Reverse Bias, this biasing can be achieved by supplying the required amount of current to the base pin. When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above. Where an input signal of low voltage is amplified switched to high voltages t0 drive loads like speakers. A Transistors acts as an Amplifier when operating in Active Region. The BC because of this large gain value is normally used to as a audio amplifier.

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As discussed a transistor will act as an Open switch during Forward Bias and as a closed switch datazheet Reverse Bias, this biasing can be achieved by supplying the required amount of current to the base pin.

BC Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

It can amplify power, voltage and current at different configurations. Where an input signal of low voltage is amplified switched to high voltages t0 drive loads like speakers. A resistor is always added in series with base pin to limit the base current.

In the below GIF you can notice the transistor being switched for a low voltage 1v audio pdd. The value of this resistor RB can be calculated using below formulae.

When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulae.

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When a transistor is used as a switch it is operated datashert the Saturation and Cut-Off Region as explained above. BC has a gain value of to ; this value determines the amplification capacity of the transistor.

Amplifier modules like Audio amplifiers, signal Amplifier etc. Also note that a PNP transistor is always used for high side switching, meaning the collector is connected to power and emitter to load that is to be switched. The BC because of this large gain value is normally used to as a audio amplifier.

Submitted by admin on 26 March Complete Technical Details can be found in the BC datasheet given at the end of this page. BC as switch When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above.

Bc558 Transistor

Of the above types common emitter type which amplifies voltage is the popular and mostly used configuration. When this transistor is fully biased then it can allow continues current of mA to flow across the collector and emitter.

A Transistors acts as an Amplifier when operating in Active Region. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV. BC is a PNP transistor hence the collector and emitter will be closed Forward biased when the base pin is held at ground and will be opened Reverse biased when a signal is provided to base pin.