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From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: sci.electronics.design
Subject: Re: Practical resistor accuracy distribution
Date: Fri, 26 Apr 2024 20:16:48 -0400
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On Sat, 27 Apr 2024 00:54:41 +0200, Klaus Vestergaard Kragelund
<klauskvik@hotmail.com> wrote:

>Hi
>
>I needed to look into distribution of accuracy of resistors.
>
>Vendors don't have any info, but luckily some nice people online have 
>done measurements:
>
><https://www.eevblog.com/forum/projects/smd-resistor-distributions/>
>
><https://lambdafox.com/resistor-tolerances/>
>
The thing to be aware of is that resistor value distributions are
often wildly non-Gaussian.  The classic example is where there are
grades, say 1%, 5%, and 20%.  The 5% group will often have a hole that
happens to match the 1% distribution perfectly.

A lot of modern resistors are made with a relatively wide
distribution, and then machine-sorted into bins.  In this case, many
of the bins will have uniform distributions.  And so on.

Joe Gwinn