Electronics > Beginners
DC barrel jacks, safe amperage?
rthorntn:
Hi,
I have an ITX server motherboard that gets 12v through an 8-pin ATX EPS connector, I'm probably doing to have to make a cable up.
Peak power draw on the motherboard is about 120W, now the power supply I have is an 150W switchmode brick PSU with a 5.5/2.1mm jack.
I'm worried that 12.5a on a 5.5/2.1mm jack is probably a bit much?
What would you do, basically I have 8 cables coming out of the EPS connector that need to go onto 2 lugs?
If the recommendation is to remove the 5.5/2.1mm jack, what to replace it with, preferably something I can easily disconnect and also the server end should be panel mountable?
Thanks.
Richard
TERRA Operative:
The datasheet from the manufacturer should tell you the maximum current it can handle.
Brumby:
It's not the most wonderful news if you're not into reading datasheets - but it's something you will do well to learn. Your question is best answered by doing exactly this.
It is also significant that you find the right datasheet for the product. Different manufacturers can make a physically compatible product that has different capabilities - such as maximum current capacity.
Ian.M:
I would be deeply suspicious of anything that puts more than a couple of amps through a 5.5mm OD power jack. Even if both plug and socket are rated for the current when new, once they've got a bit worn, reducing the contact pressure, and some dirt or tarnish has built up, there's a significant risk of overheating leading to total failure.
rthorntn:
Thanks, I am suspicious, hence the post.
The KFD-150W PSU is actually 5.5mm x 2.5mm.
My connector is Jaycar and I don't see a datasheet or a rating:
https://www.jaycar.com.au/2-1mm-bulkhead-male-dc-power-connector/p/PS0522
Any suggestions on what to do?
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