USB Power Blocker




This product does the opposite of our data blocker – it leaves the D+ and D- and ground (0V) lines untouched so that data can pass through, while blocking the 5V line which would normally provide power. It is useful for specialist applications such as some 3D printers where providing power results in undesirable effects.

Note that data transfer will not be possible without the 5V in some cases, eg between a cell phone and a computer USB socket.

Updated 10th July 2021 – Now with solid casing for improved robustness. 

This can also be purchased from Amazon UK here, and German customers may purchase here.