This method is not very straight forward as it may seem. If there is no circuit symbol, there will be a written statement. Step 4: In the datasheet you will exactly find out if it’s an NPN or PNP transistor just by looking at the circuit symbol. Step 3: Google that number and download its datasheet (you will find every transistor datasheet online) Luckily, if your transistor doesn’t have the number written, or it is removed with time. Step 2: Write down its number (it is written on its body). Step 1: Take the transistor you want to check I come up with this method when I was a student and had millions of dollars, actually billions of dollars in my pocket, in cash. The first method is the “Broke student method”. So, how to identify which is NPN and which one is PNP? I have listed the following three beginner-level methods for your understanding. The problem is, that physically, they both feel and look the same. The above simple diagram shows the different symbols for NPN and PNP transistors. Yes, you can call them the types of transistors, but you should deeply know that they fall under the category of BJTs. This is just my limited knowledge effort to help you guys somehow. I will write a separate article on the right pin configurations later on In this article, I will focus only on how to identify NPN and PNP transistors. The big problems you will face as a beginner are – configuring its rights pins & telling what type of transistor it is, i.e.
You have to be very careful while configuring its right Q-points and other parametersįinally, when you decide to put the transistor in action. The concept of the transistor feels very scary, or maybe it was just for me. You will probably see any amplifier circuit without a transistor.īut when you are a beginner to transistors. I call it a milestone because this is a huge issue, especially when you are just getting started with electronics.Ī transistor is one of the fundamental elements of an electronics circuit board. The main milestone of working with transistors is – how to identify NPN and PNP transistors.
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