Is there a simple formula for ESR

https://www.sunpower-uk.com/glossary/what-is-equivalent-series-resistance-esr/

 

It is also very important to know the actual ESR of the capacitor, which worked for some time.
Based on the exact results obtained, it is possible to make a decision on the further operation of this capacitor.
This capacitor was removed from the computer motherboard.
OST RLX 3300uF 6.3v.
ESR-0.006ohm.

 

Hi,
Recently I bought CapXon LZ low impedance capacitors to replace old capacitors. I was a little surprised at the very low ESR.
For example, 1500uF 25v-0.004Ohm.
So should it really be?

What result do you get from a measurement using the LCR Pro1 plus?

 

This version of the catalog also shows the LZ series on page 188 and following, and this catalog shows the max ESR at 100 kHz. However, the 25 volt 1000 uF cap is shown as having a max ESR of 20 mohm, whereas the data found by paulktreg shows a max ESR of 18 mohm for that cap, but both data sheets show the same ripple rating of 2180 mA.

There are no my capacitors in this catalog.

 

There are no my capacitors in this catalog.

The URL was somehow corrupted; I edited it and it should work now.

 

It happens.
Here is some more good information about ESR.
https://passive-components.eu/why-low-esr-matters-in-capacitor-design/

 

I checked some more low-impedance capacitors. In my opinion, without any surprises. Has anyone measured these capacitors at a frequency of 100 kHz?

 

What result do you get from a measurement using the LCR Pro1 plus?

At that time, I did not have the LCR Pro1 Plus. I sold this meter.
I bought a new one. I checked the result. Everything is fine.
CapXon LZ 1500uF 25v.
ESR-4.1741mohm.

 

Hi
Capacitor Teapo Low ESR.
ESR-0.009ohm.