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I've found 0.8mm to make much more reliable connections, since the specification says that the tongue should be 0.7mm. 0.6mm will disconnect if the cable is angled in any way.
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That is a very thin PCB. For anyone reading this, 1.6mm is standard.
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+copper+ENIG is going to make that 0.7mm
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i wonder how often you can plug/replug the connector in this case. how will the pcb material hold up? with my press-fit or clip-fit (is that a term?) 3d prints, ive noticed that 20 cycles can be sufficient to induce substantial 'loosening'.
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It’s likely in the order of 10-30, especially with something like ENIG as a finish. If you wanted more cycles, you’d want to switch to a hard gold finish which would likely increase the cost substantially.

This is truly only for a debug port, not anything else.

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Plug an OTG cable in and connect to that, so you don't repeat plug-unplug?
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What about the force transferred by the connector wiggling? I think You'd need a very good mechanical design on the case to make it all work.
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I don't think it's intended for thousands of mating cycles. It's a "free" standard programming/debugging/recovery/configuration interface.
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