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Q&A

Identification of semiconducting electrical components

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We identify semiconducting electrical components this way:

The first digit represents the number of pn junctions inside the semiconducting device

The two or more digit number starting at position 3 represents the searilized identification number

In the second digit I have seen only diodes with the letter N.Does it represent the material the diode is made of and what other letters can we have instead of N?

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2 comment threads

You begin with a false premise. Many, many semiconductor devices are not named as you describe. (1 comment)
By starting out lecturing, you make it difficult to answer any question. Answerers then have to eith... (1 comment)

1 answer

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JEDEC seems to number them according to one less than the number of terminals, thus TRIACs, and thyristors, and darlington transiostors get 2N numbers even though they contain 3 or more junctions.

optocouplers come in with numbers like 3N 4N 5N 6N again based on pinout more than internals.

Bridge rectifiers are 1N or 3N seemingly at random, it's possible that one or the other is not a JEDEC part number.

JIS seems to do the same as JEDEC, although I have not encountered any JDEC parts other than diodes and transistors (and darlington transistors)

Pro-Elecron (EECA) is completely different.

In the second digit I have seen only diodes with the letter N.Does it represent the material the diode is made of and what other letters can we have instead of N?

All JEDEC part numbers have N second

All JIS numbers have S second

so far as I know only Pro-Electron codes the semiconductor material type in the part number. it's the first letter

A for germanium, B for silicon, C for alloy semiconductors like gallium arsenide or tungsten carbide

There are lots of parts that are not numbered by any of these schemes or only use a numbering inspired by one of them. in fact is common for part numbers that rhyme to be similar, for example 2N3055 TIP3055 and MJE3055 are all the same kind of thing (in different packages)

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1 comment thread

JIS letters (1 comment)

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