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Is there a meaning to colors on a transitor?

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RAPo:
I've got a whole collection of (unclassified) transistors.
I'll know that a dot on it can mean it is a matched pair.

But I also have transistors with several colours.


Do these colours have a meaning?

Psi:
Yes, its just the part number without the prefix, like 2N etc..
Colors are the same numbering as resistor colors. So red red red red would be 2N2222 etc...


https://www.instructables.com/From-Resistors-to-ICs-Color-Codes/

RAPo:
Ah, thanks. That makes the classification job easier. Topline color = first digit?

Benta:
Please show the other side of those transistors. The "colour-code" hypothesis is not really credible to me.

floobydust:
I know those coloured stripes as ranking for hFE or IDSS, not the actual part number.

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