TL;DR — The RJ45 jack's category (not just the cable) sets your ceiling. Match the socket to the fastest link the port must carry over its full length.
- Cat5e jack → 100 MHz · 1000BASE-T + 2.5GBASE-T to 100 m
- Cat6 jack → 250 MHz · 5GBASE-T to 100 m · 10G only ~37–55 m (TIA TSB-155, alien-crosstalk limited)
- Cat6A jack → 500 MHz · full 10GBASE-T to 100 m · alien crosstalk (ANEXT/AFEXT) specified
Shared facts (all 8P8C, IEC 60603-7):
- 750 mating cycles minimum durability
- 1.5 A per contact @ 25 °C
- T568A/T568B pinout either way
- Channel = weakest link: a Cat5e jack throttles a Cat6A run to Cat5e
PoE++ (802.3bt, ~90 W PSE): any category carries it, but Cat6/6A jacks run cooler in bundles; plating quality matters more than the category number.
VOOHU Electronics builds Cat5e/Cat6/Cat6A RJ45 jacks (母座) + integrated-magnetics magjacks, shielded/unshielded, −40 to +85 °C industrial grade. Full write-up with spec table + FAQ:
Top comments (0)