CAT5E vs CAT6 vs CAT6A vs CAT8: Picking the Right Network Patch Cord

At a glance

Shielding shorthand

• U/UTP — fully unshielded twisted pair. Lightest and cheapest. No

grounding needed. Fine for low-EMI environments.

• F/UTP — overall foil; individual pairs unshielded. Modest noise

protection.

• S/FTP — individual foil-shielded pairs inside an overall braid.

Required for CAT8 and for CAT6A in high-density bundles where alien crosstalk dominates.

PoE and heat

Higher-AWG conductors (22 AWG > 24 AWG > 26 AWG) carry less heat per amp and matter increasingly at PoE++ (Type 4, up to 90 W). For long PoE++ runs, prefer 22 AWG CAT6A over thinner CAT6.

PVC vs LSZH jacket

PVC is the default; LSZH (Low Smoke Zero Halogen) is mandatory in plenum and riser installations in the EU and most APAC datacenters. Specify LSZH for any patch cord that will sit in a return-air plenum.

Decision rule

• Office desktop, ≤ 1 GbE — CAT5E U/UTP.

• General-purpose LAN, headroom for 10 GbE — CAT6 U/UTP or CAT6A U/UTP

at 100 m.

• Datacenter top-of-rack, 10 GbE @ 100 m — CAT6A S/FTP, 22 AWG.

• Datacenter ToR-to-server, 25/40 GbE @ 30 m — CAT8 S/FTP.

All four categories ship in PVC and LSZH from our network-patch-cord catalog.