Minimum current, current amplifier

let me take Talema AZ with the primary current of 0-25A as an example . what minimum current can be measured with it?
can we get any registrable voltage at its ouput such as at the current of 5mA on its primer?

Why don’t you look at the description (PDF)

than you for sharing the description PDF. I did not have one. This one will be helpful. Thank you so much

If you zoom in at the graph in the datasheet, then you see non-lineairities appearing at currents below 1A

You certainly cant expect any accuracy for a 5mA current and it seems unlikely that it would give any output at all, but it’s a cheap sensor and you can always try.

The most sensitive version is the AZ-0500 which has an output of 2V @30A.
For 5mA that would be:

2/30 = 67mV per ampere
0.06666 * 0.005 = 333uV

The advantage of this type of current sensors is that they have a big hole in the middle.
Maybe there are current transformers that can measure in the mA range, and just go into saturation at higher currents. That way you may be able to put two current transformers on your wire for different ranges.

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I do not see how this is related to KiCad as a software. Please post such questions in more suitable forums (eevblog…).

I do not, either. @Munyua_wa_Mugo, we appreciate your attitude to learn and you using KiCad, but we have to keep this forum clean and focused on KiCad. Discussions about electronics and other related topics is often interesting, but for those who read the forum to know more about KiCad it may be frustrating to browse through topics which aren’t related to KiCad. It also makes finding relevant answers to questions harder using the search feature.

There have recently been clear increase in the amount of new posters and topics, probably due to the release of version 6. This makes keeping the forum clean even harder for the moderators. At some point we may have to start locking off-topic threads more often. Discussions not related to KiCad have usually been tolerated, but the freedom brings responsibility to not use it too much.


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