Just FYI...

[Wayne]

"Standard USB has a minimum rated lifetime of 1,500 cycles of insertion and removal, the mini-USB receptacle increases this to 5,000 cycles, and the newer Micro-USB and USB-C receptacles are both designed for a minimum rated lifetime of 10,000 cycles of insertion and removal."

Hmm, apparently smaller is better.

The microSD card connectors are good for 10,000 insertion/withdrawal cycles according to Fujitsu. Not sure about the full-size SD connectors.

I haven't found any 'conclusive' info on the RJ-45, but I see 1,000 cycles mentioned in a few places.

[Dewayne Irons]

Thanks, Wayne- interesting numbers. I do a lot of RJ 45 for my ethernet cable.
mahalo, Dewayne

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[B Reiss]

The weakness with those numbers is they are basically measuring the thickness of the gold plating on the contacts. I've done it myself, balancing lifetime insertions vs gold plating thickness. Running hundreds of connect/disconnect cycles.

But it assumes you are inserting carefully and correctly. They usually test with fixtures, to ensure optimal alignment. No twisting, no angle, no offset. Those things stress the (usually) plastic housing. For me, that's what always breaks, the plastic housing. I've never seen a connector with any kind of spec for how long the plastic bits last.

For years I was being cheap, and using RJ45 cables with broken clips. Works fine, until a gnat lands on the cable, moves it just slightly, the connection fails (usually intermittently), and I spend all day tracing the issue back to a loose connection.

Now when the clip breaks, I cut the cable in half. Just to prevent myself from using it again.

Bruce