The 2N is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. This transistor is low-cost, widely available and sufficiently robust to be of use by experimenters and electronics hobbyists. The 2N is used very frequently in hobby electronics projects, including home-made ham radios , code-practice oscillators, analog amplification, and interfacing device for microcontrollers. The complementary PNP transistor is 2N From Wikipedia, the free encyclopedia. ON Semiconductor.
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To Alpha. To Bottom of Page. The letter is always 'N', and the first digit is 1 for diodes, 2 for transistors, 3 for four-leaded devices, and so forth. But 4N and 5N are reserved for opto-couplers. The sequential numbers run from to and indicate the approximate time the device was first made. If present, a suffix could indicate various things. For example, a 2NA is an enhanced version of a 2N It has higher gain, frequency, and voltage ratings. Always check the data sheet.
Japanese Industrial Standard JIS These part numbers take the form: digit, two letters, sequential number, [optional suffix]. Digits are 1 for diodes, 2 for transistors, and so forth. The letters indicate the type and intended application of the device according to the following code:. The sequential numbers run from The optional suffix indicates that the type is approved for use by various Japanese organizations.
Since the code for transistors always begins with 2S, it is sometimes omitted; for example, a 2SC could be marked C Pro-Electron European These part numbers take the form: two letters, [letter], sequential number, [suffix].
Instead of 2N and so forth, some manufacturers use their own system of designations. Some common prefixes are:. Many manufacturers also make custom parts, or custom-label standard parts, for large volume OEM customers. Typically, they have the OEM's mark or logo and part-number.
When such parts hit the surplus market, they end up in hobbyist "bargain packs". Since data on these devices is not usually available, they are best used as LED-drivers and other such applications where the actual specifications are not critical.
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