Schottky diode “replacements”

[schmarduino]

Hi again, I have a question concerning the use of devices advertised as “Schottky diode replacements”.

These appear to be mosfets that conduct at a very low forward voltage and cutoff with any reverse voltage. Some are advertised to carry a pretty significant forward current (from a few amps to tens of amps).

Has anyone had any experience with these? You can find them on AliExpress and I am curious about using them to replace the Schottky diodes on a 100 watt (12 V) solar panel, to mitigate losses due partial shading of the panel.

Here is an example I am talking about….

[Koepel]

A Schottky diode can still have a voltage drop of 0.5V.
A mosfet with a switching circuit can act as the ideal diode.

In the picture it looks as if it is good quality.
The question is, do you dare to take the risk.
Maybe something goes wrong if the module gets dirty or damp, maybe the pcb can not deal with large currents.

I'm am answering your question because there is almost no chance that someone has this module in a project.

[jremington]

Interestingly, the mystery product is claimed to be useful for "antireverse irrigation and charging reverse irrigation protection".

[Koepel]

Link: https://www.aliexpress.com/item/1005004341370803.html

[DrDiettrich]

@jremington

antireverse

I wonder which FET type will come without a body diode.

[schmarduino]

I have already purchased a few examples and I will test a few to see how they behave........

[Wawa]

@schmarduino

... to mitigate losses due partial shading of the panel.

Google "smart bypass diode"
Leo..

[JohnRob]

None