Identifying Plug Polarity on Power Supplies

Desktop Power supplies such as those found within our Power Supplies - External/Internal (Off-Board) | AC DC Desktop, Wall Adapters | DigiKey category include a filter for positive or negative centers on the output barrel plug.

If you are replacing a power supply, the easiest way to identify which one you need is to look at the label for one of the following symbols:


Here are some examples of where to find this graphic:

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