TL;DR on how long an RJ45 connector actually lasts:
- Mating cycle = one full insert + withdraw. The durability rating = how many it survives within spec.
- IEC 60603-7 minimum = 750 cycles. That's the floor, not the target.
- Commercial jacks ~1,000 cycles; industrial-grade 10,000+.
- Gold plating drives it: 3-6 uin (economy) -> ~250-500 cycles; 15 uin -> ~750; 30 uin -> ~1k-2.5k; 50 uin (1.27 um) -> 2.5k-10k+.
- Wear mechanism: gold wipes through to nickel -> fretting corrosion -> contact resistance climbs -> intermittent link (and heat on PoE ports).
- Reality check: the plastic latch usually breaks before the contacts wear out, so don't yank cables by the cord.
- Specify by churn: rarely-unplugged = 15-30 uin is fine; high re-patch / data center / test bench = 50 uin + high cycle rating.
- Field plugs are semi-disposable - re-terminate worn ones.
Full guide (tables + FAQ) from VOOHU Electronics, who manufacture RJ45 connectors across these durability tiers: https://voohuelectronic-ux.github.io/voohu-rj45-guide/resources/rj45-mating-cycles-durability.html
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