What is transistor and its function?
A transistor is a semiconductor device used to amplify or switch electrical signals and power. The transistor is one of the basic building blocks of modern electronics. It is composed of semiconductor material, usually with at least three terminals for connection to an electronic circuit.
Is BC 557 a NPN?
BC547, BC557 series devices are silicon NPN – PNP small signal transistors, manufactured by the epitaxial planar process, designed for general purpose amplifier ,switching and AF amplifier applications.
How do I use BC557?
It is used in different driver modules such as LED driver, relay driver, etc. It is used in amplifier modules such as signal, audio, etc. BC557 transistor can be used where small amplification is necessary like an audio amplifier within electronic bells, radios, buzzers, etc.
Why we should use transistor?
Advantages of using Transistors It is small in size and is very cost-efficient. It needs very low voltage to function. It has a long life and requires no power to operate. A single integrated circuit can be developed using the transistor.
What is the most important function of a transistor?
The essential utility of a transistor comes from its ability to use a small signal applied between a pair of terminals to control a much larger signal at another pair of terminals. This property is called gain.
What is the HFE rating of bc557 transistor?
BC557 is a general-purpose transistor, used like an amplifier or a switch in electronic circuits. Its hFE ratings of this transistor range from 125 to 800 to make the transistor ideal by using like an amplifier within electronic circuits like audio signal amplification. These ratings can be determined through the final letter after its digit.
What is bc557 PNP transistor?
BC557 is a popular PNP bipolar junction transistor that comes in a small TO-92 package. It is a general-purpose PNP transistor that can be used in electronic circuits as a switch or amplifier. In today’s blog, we’ll gonna show u all about BC557 PNP transistor, its pinout, parameter, how does it work, where to use it and so on, hope this blog helps!
Where can I find the technical details of bc557?
Note: Complete Technical Details can be found at the BC557 datasheet given at the end of this page. BC557 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.
Why is bc557 called a current controlled device?
BC557 is known as a current controlled device because the small current present at the base side is used to control the large current present at the remaining terminals. Remember that when the transistor is turned off, there is a current at the base terminal, whereas when the transistor is turned on, there is no current at the base terminal.