Quick Answer: Can I Use Any Transistor?

Are NPN and PNP transistors interchangeable?

Answer: NPN and PNP transistors are interchangeable if you remember one simple rule: A bipolar transistor is essentially two back-to-back diodes with the base being the common connection..

What is NPN vs PNP?

With respect to sensors, an NPN device is one that can switch the negative side of the circuit while a PNP device switches the positive side. … NPN sensors are sometime called “sinking sensors” because they sink ground to the output. The term “load” identifies the device the sensor powers.

Is Sinking PNP or NPN?

PNP sensors are sometimes called “sourcing sensors” because they source positive power to the output. NPN sensors are sometime called “sinking sensors” because they sink ground to the output. … NPN and PNP are technical terms for the type of transistor used to switch the output.

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.

Is PNP positive common?

PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state.

Which transistor is best?

Best Transistors: BJTs#1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits. … #2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT. … #3 Power – TIP120. … #4 N-Channel (Logic Level) – FQP30N06L.

Can I replace mosfet with transistor?

Since switching voltages above 5 V or up to 12 V is easily available from most digital and analogue ICs, mosfets can be quickly interfaced with any source irrespective of the load current. So it means, in general we can easily replace a BJT with a mosfet, provided we take care of the relevant polarities.

Which transistor is used in Tesla coil?

A high current high frequency transistor like 2N2222 is used to supply current through the primary coil (violet colour).

Are transistors interchangeable?

Others are set up for a particular application even though they are all part of the same family of components (capacitors, resistors, inductors, transistors, diodes). So yes transistors are interchangeable, if the type (npn/pnp) and required specs match.

Why is VBE 0.7 V?

For an unbiased transistor, considering only the BE junction which is a pn junction diode, 0.7V is the potential barrier. In an npn transistor base is positive(p) and emitter is negative(n). … But in a pnp transistor the base is negative(n) and emitter is positive(p) so the vbe=-0.7V.

How do I choose the right transistor?

Transistor data is available from most suppliers, for example see Rapid Electronics.Choose the right type of transistor, NPN or PNP. … Find out the supply voltage(s) and load properties. … Work out the transistor properties required. … Work out a value for the base resistor R. … Check if you need a protection diode.

Can I use any NPN transistor?

Can I use any NPN transistor in place of a different NPN transistor? … Well, sometimes you can, if you know what you are doing or if the way the transistor is being used isn’t very important. An example of the latter would be a pass transistor switching on a low power circuit.

What are the 2 types of transistors?

Types of transistorThere are two types of standard (bipolar junction) transistors, NPN and PNP, with different circuit symbols as shown. … The leads are labelled base (B), collector (C) and emitter (E). … In addition to bipolar junction transistors, there are field-effect transistors which are usually referred to as FETs.More items…

Where can I find a transistor?

Your computer’s got jillions of them. In discrete forms, you’ll most likely come across one in some white goods appliance, like a washing machine or a dishwasher, being used as an on/off for a relay carrying a high voltage. In this they’re used as a switch.

What can we use instead of transistor?

The most obvious alternatives to transistors are vacuum tubes and electromechanical relays. In addition, magnetic amplifiers (magamps) are useful. Piezoelectric relays are rare. Rotating amplifiers, such as amplidyne motor-generator machines are useful at higher power levels.