BC457 DATASHEET PDF

See detailed ordering and shipping information in the package dimensions section on page 5 of this data sheet. Parameters and Characteristics. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. It has a maximum current gain of When uses as an Datasheef the DC current gain of the Transistor can be calculated by using the below formulae. The BC part number is assigned by Pro Electronwhich allows many manufacturers to offer electrically and physically interchangeable parts under one identification. The value of I B should not exceed mA.

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Note: Complete Technical Details can be found at the datasheet give at the end of this page. BC is a NPN transistor hence the collector and emitter will be left open Reverse biased when the base pin is held at ground and will be closed Forward biased when a signal is provided to base pin. 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 I B 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. When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above.

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 R B can be calculated using below formulae. The value of I B should not exceed mA. A Transistors acts as an Amplifier when operating in Active Region. It can amplify power, voltage and current at different configurations. Of the above types common emitter type is the popular and mostly used configuration.

When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulae. 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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BC457 DATASHEET PDF

Note: Complete Technical Details can be found at the datasheet give at the end of this page. BC is a NPN transistor hence the collector and emitter will be left open Reverse biased when the base pin is held at ground and will be closed Forward biased when a signal is provided to base pin. 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 I B 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.

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