BC847 PDF

Learn how and when to remove this template message The BC was released with, and often is found together in datasheets with, the BC higher voltage and BC lower noise devices, that correspond to the original BC and BC variants of the BC This group of NPN transistors share many specifications and characteristic curves, but differ in voltage ratings - the BC and BC are essentially the same as the BC but selected with higher breakdown voltages , while the BC is a low noise version, and the BC is both high-voltage and low-noise. See the BC family for a table of these differences, and comparisons with predecessor types. Some manufacturers specify their parts with higher ratings, for example the Fairchild datasheet ABC, Rev B for the BC, sourced from Process 10 gave mA as the maximum collector current, while their datasheets dated have dropped the current rating to the standard mA.

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BC has a gain value of to , this value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor.

To bias a transistor we have to supply current to base pin, this current IB should be limited to 5mA. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. 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.

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. As mentioned the biasing current should maximum of 5mA. Anything more than 5mA will kill the Transistor; hence a resistor is always added in series with base pin.

The value of this resistor RB can be calculated using below formulae. The value of IB should not exceed mA. It can amplify power, voltage and current at different configurations. Some of the configurations used in amplifier circuits are Common emitter amplifier Common base amplifier Of the above types common emitter type is the popular and mostly used configuration.

Amplifier modules like Audio amplifiers, signal Amplifier etc.. Darlington pair 2D model of the component If you are designing a PCD or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions.

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