UTP, FTP, S/FTP? Small Refresh Might Be Useful

Are you also sometimes not sure whether you are correctly using acronyms marking data cables that are mostly used for Ethernet?

This is an archive article published 27.12.2018. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.

Today we already know that if someone felt that the Internet would be a "big thing" 20-30 years ago, they were right. Few people, however, probably assumed that the Internet will influence both, the industry and the private sphere in such extent.

Despite of wireless technologies boom, wired installations still have some irreplaceable advantages and they remain to be a main pillar for data communication especially in industry.

Thanks to the Internet at work and in households, even a non-professional already heard cable marking terms like UTP or FTP. The problem is that we mark different cables with the same acronym many times, as can be seen in various articles, blogs, web discussions etc.

Let´s briefly recall the meaning and differences among particular cables as defined by ISO/IEC 11801:200.

U/UTP
A cable without any shielding (Unscreened), only with twisted pairs (TP). A common unscreened cable usually marked as UTP cable.

F/UTP (FTP)
An overall foil shield (F) with unscreened twisted pairs (UTP). This cable is very much like common UTP cables, with the addition of foil underneath the main cable jacket. Another common name for this cable is FTP. F/UTP cables are common in 10GBaseT applications.

S/UTP
An overall braid screen (S) with unscreened twisted pairs (UTP). This is occasionally referred to as the STP cable but beware: this term is sometimes used also for the following cable with different construction. To be sure, always check the exact construction of a given cable.

SF/UTP
Both an overall braid screen (S) and foil shield (F) with unscreened twisted pairs (UTP). This cable is also occasionally referred to as the STP cable. Cables with an overall braided screen are very effective at protecting EMI from entering or exiting the cable.

S/FTP
An overall braid screen (S) with foil screened twisted pairs (FTP). The “shield” underneath the jacket is a braid, and each individual pair is surrounded by its own foil barrier. The purpose of the additional foil on individual pairs is to limit the amount of crosstalk between them.

F/FTP
An overall foil shield (F) with foil screened twisted pairs (FTP). Similar to F/UTP cables, these shielded cables are commonly used in 10GBaseT applications.

U/FTP
No overall shielding or braid (U) with foil screened twisted pairs (FTP). This type of shielded cable is commonly used in 10GBaseT applications as well.

A thin wire, so called “drain wire” is almost always used along with the screening, making assembly of RJ45 connectors (shielded) easier.

Now, when it´s all clear you´ll certainly easily identify marking of F/UTP cable, which we newly incorporated into our standard stock offer. It is the well-proven 1633E Cat5E cable from Belden company, suitable for all common installations in buildings.

Wires are solid AWG24 with aluminium foil screening (+ AWG26 „drain wire“). The cable meets all common norms and with its 6.0mm outer diameter it´s easily usable with a vast majority of RJ45 connectors. A detailed specification can be found in the datasheet available with 1633E cable, including parameters which are not always mentioned by various producers. With a maximum voltage of 72V and a continuous current of 1.5A (@ 25´C), it´s easily usable also for PoE applications.

In case of interest in any cables from company Belden, please contact us at sales@soselectronic.com

Advantages/ Features of the 1633E cable:

  • branded Cat5E cable from renowned producer Belden
  • meets all common norms
  • detailed datasheet including parameters which are unknown for “no-name” cables
  • also usable for PoE applications
  • operating temperatures range of -30 to +60°C

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Main products


1633E F/UTP CAT5e (1633E.00305) BELDEN  
1633E F/UTP CAT5e (1633E.00305)

Cable 4xTwistedPair-solid wires CAT5e AWG24/1

CAT Network Cables

Ord. No.: 237459
Manufacturer: BELDEN
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937-SP-3088 BEL STEWART  
937-SP-3088

Modular Plug RJ45 8P8C Stranded Cable IDC

Western Modular/ RJ Connectors

Ord. No.: 211602
Manufacturer: BEL STEWART
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NE8MX NEUTRIK  
NE8MX

Modular Plug etherCON RJ45 8P/8C CAT5e for Cable, Nickel Shell

Western Modular/ RJ Connectors

Ord. No.: 324097
Manufacturer: NEUTRIK
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TZB 403 (RJ-45) VARIOUS  
TZB 403 (RJ-45)

Modular Plug RJ45 8P8C Solid or Stranded Cable IDC

Western Modular/ RJ Connectors

Ord. No.: 29045
Manufacturer: VARIOUS
in stock 10165 pcs
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TZB510 (TM11AP-88P) HIROSE  
TZB510 (TM11AP-88P)

Modular Plug RJ45 8P8C Cable IDC Shielded

Western Modular/ RJ Connectors

Ord. No.: 38410
Manufacturer: HIROSE
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TZB 507 BK VARIOUS  
TZB 507 BK

Hood for Modular Plug RJ45, Black

Western Modular/ RJ Connectors

Ord. No.: 55020
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TZB 507 BU VARIOUS  
TZB 507 BU

Hood for Modular Plug RJ45, Blue

Western Modular/ RJ Connectors

Ord. No.: 55019
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TZB 507 GN VARIOUS  
TZB 507 GN

Hood for Modular Plug RJ45, Green

Western Modular/ RJ Connectors

Ord. No.: 55022
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TZB 507 GY VARIOUS  
TZB 507 GY

Hood for Modular Plug RJ45, Grey

Western Modular/ RJ Connectors

Ord. No.: 54635
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TZB 507 YE VARIOUS  
TZB 507 YE

Hood for Modular Plug RJ45, Yellow

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Ord. No.: 55021
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