This jack is the most common size associated with DC wall-wart power supplies, and is compatible with the lower power wall-type supplies that we sell.
What is really useful about this jack is that it provides a handy way to connect DC power from a 2.1mm plug to a pair of wires. This hard to find adapter will see a lot of use in your various projects.
For information about sizes, polarity and choosing the right barrel-type connector, see All About DC Barrel Jacks/Plugs.
DC Power Jack Adapter, Barrel-type, 2.1mm To Screw Terminal by Provide Your Own is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
