What is a BFY51?

Description. A BFY51 Transistor is an NPN (Negative-Positive-Negative) Bipolar Transistor: the most commonly used transistor configuration. The BFY51 Collector is connected to the positive (+ve) supply via the load.

Which is the most commonly used transistor configuration Why?

Common emitter transistors
The CE configuration is the most widely used configuration and n-p-n transistors are the most commonly used transistors. Common emitter transistors are used most widely, because a common emitter transistor amplifier provides high current gain, high voltage gain and high power gain.

Can I use any NPN transistor?

So yes transistors are interchangeable, if the type (npn/pnp) and required specs match.

Why NPN transistor is preferred over PNP?

The majority charge carriers in an NPN transistor are electrons and the majority carriers in a PNP transistor are holes. The electrons have better mobility than holes. Therefore, NPN transistors are preferred over PNP transistors.

Which type of transistor is most commonly used NPN or PNP?

And we already know that the mobility of electrons is far better than the holes. So n-p-n transistors are preferred as they amplify the signals. So the correct answer is that n-p-n transistors are preferred to p-n-p transistors because electrons have higher mobility than holes and hence high mobility of energy.

Is BC547 transistor NPN or PNP?

BC547 -> BC547 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.

What will replace transistors?

IBM aims to replace silicon transistors with carbon nanotubes to keep up with Moore’s Law. A carbon nanotube that would replace a silicon transistor. Image courtesy of IBM.