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Is BC 547 NPN or PNP?

Is BC 547 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 is the difference between NPN and PNP?

The main difference between the NPN and PNP transistor is, an NPN transistor turns on when the current flows through the base of the transistor. A PNP transistor turns ON, when there is no current at the base of the transistor. In this transistor, the current flows from the emitter (E) to the collector (C).

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.

What does BC547 mean?

BC547 is a Bipolar Junction Transistor, abbreviated as BJT. It is an NPN transistor. It has three terminals named as: Emitter. Collector.

Can I use 2N2222 instead of BC547?

So it really doesn’t matter whether you want to use 2n2222 or BC547 NPN transistor. You can update the circuit at anytime, you can replace the 2n2222 NPN transistors with the BC547 and it will have no negative effect on the project.

Where are PNP transistors used?

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.

What is the symbol of NPN transistor?

NPN vs PNP Transistor

NPN Transistor PNP Transistor
Symbol
Collector-emitter voltage Positive Negative
Emitter arrow Pointed out Pointed in

Is NPN or PNP more common?

PNP sensors tend to be more commonly used. There are several factors that can influence what type of output to use, but none is determinant, in the market there are sensors of both types as well as PLC cards. In Europe it is more common to use PNP, whereas in Asia it is more common to find NPN.

When would you use a PNP transistor?

A current flowing into the base of the NPN turns on the transistor whereas a current flowing out of the base turns on the PNP. Thus the most common use for NPN devices is for switching the ground side of a circuit. PNP devices are used to switch from the positive side.

Is a PNP sensor sinking or sourcing?

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.

Why is BC547 used?

BC547 Transistor Application BC547 is usually used for current amplifier, quick switching and pulse-width modulation (PWM). In addition, it can also be used as a switch that you can easily switch on or off a DC device with this transistor.