The NPN transistor consists of three leads which are connected with the internal layers.
Another way to check whether a transistor is NPN or PNP is to use a multimeter. It can only be detected by checking the part number written on the transistor and checking the datasheet or searching on the internet. The physical appearance of both the transistors are identical due to which one cannot detects which is NPN and which is PNP. But the BJT is completely different from FET and MOSFET because the BJT transistor is a current operated device and the FET and MOSFET are voltage operated devices.Īs mentioned above BJT transistors are manufactured in two types which are NPN and PNP. To make it more clear or easy to understand we can say that like the BJT have “NPN and PNP” same as the FET and MOSFET has “P-Channel and N-Channel”. Like BJT both FET and MOSFET has two types which is called N-Channel and P-Channel. Before discussing the two types of FET transistors like BJT have we should know that FET transistor also has other type which is called MOSFET. The two types of BJT transistors are called NPN and PNP. Both the types such as BJT and FET are further divided in to two types. There are two main types of transistors which are BJT which stands for “Bipolar Junction Transistor” and other is FET stands for “Field Effect Transistor”. Types of Transistors & BJT VS FET / MOSFET The transistors as switches are also the base of logic gates which are used to build internal circuitry of computers, cell phones, smart phones etc. Different transistors have different load driving and other capabilities which the user or circuit designer used according to the load requirements and it is also one of the reason there are different part numbers and types of transistors are there. The load can be an LED, a motor or any type of electronic device. This input signal or current decides how much current should be allowed between the collector and emitter or in other words we can say how much current you want to provide to the load. When a transistor is used in switching mode it drives load according to the input signal or current on its base. A transistor is an electronic component whether it’s a NPN or PNP both are used for two jobs one is switching and the other is amplification. In this post we are going to discuss about NPN VS PNP transistor or what are the difference between these two types.
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