Difference Between NPN and PNP

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.

1. Which is better NPN or PNP?
2. How can you tell NPN from PNP?
3. Can I use PNP instead of NPN?
4. Is PNP normally open?
5. What is NPN and PNP in PLC?
6. How do you identify a CBE in a transistor?
7. How do you know if a transistor is working?
8. How can you tell that a transistor is NPN type with an ohmmeter?
9. How NPN sensor is used as PNP?
10. Where are PNP transistors used?
11. What is the symbol of PNP transistor?

Which is better NPN or PNP?

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..

How can you tell NPN from PNP?

There is one B-E and one B-C. In a NPN, it takes positive voltage on the base relative to E or C to make the diodes conduct, and the other way around with a PNP. The "N" and "P" in the names tells you the voltages required to make the diodes conduct.

Can I use PNP instead of NPN?

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.

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).

What is NPN and PNP in PLC?

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.

How do you identify a CBE in a transistor?

In plastic casing, one side of the transistor is Flat which is the front side and the pins are arranged serially. To identify the pins, keep the front flat side facing you and count the pins as one, two etc. In most NPN transistors it will be 1 (Collector), 2 (Base) and 3 ( Emitter ). Thus CBE.

How do you know if a transistor is working?

Connect the base terminal of the transistor to the terminal marked positive (usually coloured red) on the multimeter. Connect the terminal marked negative or common (usually coloured black) to the collector and measure the resistance. It should read open circuit (there should be a deflection for a PNP transistor).

How can you tell that a transistor is NPN type with an ohmmeter?

So back to the transistor, put the ohmmeter on the 1K ohm range, hook the positive ohmmeter lead to the base and the negative one to the emitter. A NPN transistor will show a low resistance, a PNP one very high resistance, and the opposite when you switch leads.

How NPN sensor is used as PNP?

The Yocto-PWM-Rx can also read an NPN or PNP output.
...
To interface an NPN sensor with a Yocto-PWM-Rx, you need:

1. To connect ground (-) of the external power supply and the sensor blue wire on the module ground.
2. To connect the (+) of the external power supply and the brown wire of the sensor together.

Where are PNP transistors used?

Applications

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

What is the symbol of PNP transistor?

PNP vs NPN Transistor