Difference Between NPN and PNP Transistor

In an NPN transistor, the flowing current runs from the collector terminal to the Emitter terminal, whereas in a PNP, the flow of current runs from the emitter terminal to the collector terminal. PNP transistor is made up of two P-type material layers with a layer sandwiched of N-type.

1. What is the difference between NPN and PNP?
2. What is the difference between NPN transistor and PNP transistor?
3. Which is better PNP or NPN transistor?
4. What is the meaning of NPN and PNP transistor?
5. Is PNP normally open?
6. Can I use NPN instead of PNP?
7. Where are PNP transistors used?
8. How does a PNP transistor works?
9. How NPN sensor is used as PNP?
10. What is the symbol of PNP transistor?
11. Is PNP or NPN more common?
12. When PNP transistor is used as an amplifier?

What is the difference between NPN and PNP?

As they are normally referred, PNP and NPN sensors are both supplied with positive and negative power leads, then produce a signal to indicate an “on” state. PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state.

What is the difference between NPN transistor and PNP transistor?

In an NPN transistor, a positive voltage is given to the collector terminal to produce a current flow from the collector to the emitter. In a PNP transistor, a positive voltage is given to the emitter terminal to produce current flow from the emitter to collector.

Which is better PNP or NPN transistor?

A NPN transistor has electrons as majority charge carriers whereas the PNP transistor has holes as majority charge carrier. The mobility of electrons is better than mobility of holes. ... mobility of electrons is more than hole,so as a result npn transistor are faster than pnp that's why they are preferred..

What is the meaning of NPN and PNP transistor?

NPN stands for Negative, Positive, Negative. Also known as sinking. On an IO Module, an NPN input, when undriven is pulled down to be in a low state, GND ( or reference voltage level e.g. V-). PNP stands for Positive, Negative, Positive. Also known as sourcing.

Is PNP normally open?

PNP - (PNP transistor) NO – normally opened, that means there is no voltage on the output while the sensor is not actuated (see picture, PNP sensor output connector is no. 4).

Can I use NPN instead of PNP?

Generally, the PNP transistor can replace NPN transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. PNP transistors can also be used as switching devices and an example of a PNP transistor switch is shown below.

Where are PNP transistors used?

Applications

• PNP transistors are used to source current, i.e. current flows out of the collector.
• PNP transistors are used as switches.
• These are used in the amplifying circuits.
• PNP transistors are used when we need to turnoff something by push a button. ...
• Used in Darlington pair circuits.

How does a PNP transistor works?

The PNP transistor turns on when a small current flows through the base. The direction of current in PNP transistor is from the emitter to collector. ... The base of the PNP transistor has always been negative with respect to the emitter and collector. In PNP transistor, the electrons are taken from the base terminal.

How NPN sensor is used as PNP?

To connect the black wire on the channel of your choice. To configure the corresponding channel as input. If you use an NPN sensor, you must also configure the corresponding input in "open drain" mode to enable the internal pull-up. In the opposite, if you use a PNP sensor, disable open drain.

What is the symbol of PNP transistor?

PNP vs NPN Transistor

Is PNP or NPN more common?

PNP sensors tend to be more commonly used. Traditional relay type control circuit; Use with a programmable logic controller (PLC). ... Less common nowadays are input cards that 'source', these were popular in Asia and require the NPN type of sensor in order to operate correctly.

When PNP transistor is used as an amplifier?

Electrons and holes always move in opposite directions. Thus, the holes move from base to emitter. When the pnp transistor is in forward bias, holes move from emitter to base and the electrons move from base to emitter. For a npn transistor to be used as an amplifier, forward bias has to be applied on the transistor.