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Q&A

what is the popular 12v dc jack connector

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im designing PCB for a project , 12v input power supply is provided externally, so user will buy power adapter , so putting popular dc jack in PCB is best choice

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Pick several and fit them all to cover as many variations as you think are required. Also fit inverting links so that a barrel jack with the centre pin with opposite polarity can be reversed. Or use a bridge rectifier to automatically produce the correct polarity. Andy aka‭ 22 days ago

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There is no "standard" 12 V DC jack. Asking end users to buy a separate power supply is asking for trouble. Don't expect users to know about center-positive versus center-negative, and inner and outer barrel diameter.

If this is an OEM product, then you can provide binding posts or even just labeled solder pads for +12 V and the return. Otherwise, your product should come with whatever power supply is needed.

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