Complete electronics beginner here. I'm trying to control a high power LED (6V, 20A) using my Arduino R4. I understand that I need to use a relay for this, but the only relays I can find that the arduino can drive only go up to 10A (for example this one). My question is, can I just use two of these relays in parralel or will I have issues activating them preciscly enough with 2 different pins without burning them out? And more generally, am I even going about this correctly? Switching speed doesn't particularly matter for this application btw. Thank you for your time!
This goes up to 30A:
https://aliexpress.com/item/4000185959463.html
You can recognize it easily from "weird" shape relay.
High amp mosfet could be option as well.
IRLB8721, IRFH6200*, IRFZ44N, plus many more
*SMD
Amazing, thank you guys so much!
No, only 20A
You would want something rated for at least 25A
You would want something rated for at least 25A
How do you figure? On the part is says 30V30A Dc no?
The datasheet says otherwise.
Maybe some old 240VAC/28VDC model does.
30VDC model gives 30A for all contact arrangements A/B/C
I don't see a 30VDC model anywhere, just the part number, SLA-05DC-SL-C and it is not even rated for DC
To be specific, not even manufacturer is printed on Amazon photo.
Relay face printing gives 30A 250VAC / 30VDC though.
Either the part numbershown is wrong or the ratings on the relay are.
Up to @djaik19289402navidson to decide.
I don't recommend that anyone buy any of those cheap unbranded relay products, especially from aliexpress
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Some surprises can just be passed along.
To answer OPs questions:
NO. They will fail quickly.
YES, you will have issues.
Rather than performing two digitalWrite(), consider port manipulation. Both pins will change at the same time.
https://docs.arduino.cc/retired/hacking/software/PortManipulation/
and so is the datasheet
Which doesn't mention rating for DC. So only rating is on the name plate.
and that is why @djaik19289402navidson should not buy it
So he could happily buy this one:
Because the crap datasheet does give DC rating.
Honestly, It's the same. If you can't trust the nameplate, why should you trust the datasheet.
Better to buy Omron relay.
-but unfortunately they are mostly fake.
Is this topic done or still open?