Electronics > Beginners

DC barrel jacks, safe amperage?

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rsjsouza:
I have some development boards that are rated for 7A on barrel jack connectors, and an old Alienware laptop sees 9A through a slightly larger one. Both have the spring contacts, not the smooth barrel.

HB9EVI:
4 pin Molex, 2 for each polarity; that's the common setup for hamradio transceivers which use to take about 20A

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