RJ Adapters, Couplers & Extensions

RJ (registered jack) adapters are devices used to convert registered jack connections from one type to another. RJ25 connectors are a standardised connection used in telecommunications applications.

What are RJ adapters used for?

RJ adapters can cover a range of purposes, depending on what type of adapter they are.

  • Couplers join two different connectors together, using two input ports
  • Extensions increase the range of transmission by adding to the length of cable
  • Adapters proper allow different connections to be joined, such as an M12 cable joining to an RJ45 connection

Types of RJ adapters

RJ adapters mainly differ in how many ports they have. They may have between one and six ports, allowing them to connect up to six cables. They can also differ in their wiring configuration, and indeed there are many different types of adapters, from feedthrough connectors to junction boxes to couplers, depending on what you need to convert between. They can be shielded or unshielded.


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Description Price Type Interface Type LAN Category Number of Ports Shield Type Wiring Configuration Length Width Depth Diameter Extension Length Series Series Number
RS Stock No. 186-3111
BrandRS PRO
MYR67.22
Each
units
Modular Coupler RJ45 - 2 Shielded Straight Through 18.54mm 21mm 27.46mm - - - -
RS Stock No. 186-3149
BrandRS PRO
MYR28.93
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 340-9630
BrandRS PRO
MYR40.75
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 916-0259
BrandRS PRO
MYR56.18
Each
units
Feedthrough Connector RJ45 Cat6 2 FTP - - 26mm - - - FT -
RS Stock No. 186-3048
BrandRS PRO
MYR17.96
Each
units
Coupler RJ45 Cat3 - UTP Straight Through 22.02mm 16mm 37.3mm - - - -
RS Stock No. 186-3155
BrandRS PRO
MYR15.19
Each
units
Extender RJ11 Female, RJ11 Male Cat3 1 - - - - - - 2 m - -
RS Stock No. 186-3133
BrandRS PRO
MYR11.97
Each
units
Coupler RJ11 - 2 Unshielded Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 340-9624
BrandRS PRO
MYR30.80
Each
units
Coupler RJ45 Female Cat5 - UTP Straight Through 17.3mm 16.3mm 28mm - - - -
RS Stock No. 186-3032
BrandRS PRO
MYR10.93
Each
units
Coupler RJ11 Cat3 - UTP Straight Through 22mm 16mm 37.3mm - - - -
RS Stock No. 907-5668
BrandRS PRO
MYR37.88
Each
units
- - Cat6 - FTP - - - - - - FT -
RS Stock No. 916-0255
BrandRS PRO
MYR32.92
Each
units
Feedthrough Connector RJ45 Cat6 2 UTP - - 26mm - - - FT -
RS Stock No. 382-2689
BrandRS PRO
MYR14.96
Each
units
Adapter 9 Way D-Sub Plug/RJ45 Socket - - Shielded - 49.5mm 33mm 15mm - - - -
RS Stock No. 907-5665
BrandRS PRO
MYR35.17
Each
units
- - Cat6 - UTP - - - - - - FT -
RS Stock No. 186-3098
BrandRS PRO
MYR21.40
Each
units
Splitter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 186-3161
BrandRS PRO
MYR28.76
Each
units
Extender RJ45 Female, RJ45 Male Cat3 1 - - - - - - 2 m - -
RS Stock No. 916-0243
BrandRS PRO
MYR29.95
Each
units
Feedthrough Connector RJ45 Female Cat5e 2 UTP - - 26mm - - - FT -
RS Stock No. 818-665
BrandRS PRO
MYR15.12
Each
units
Adapter 9 Way D-sub Female, RJ11 - - Unshielded - 15mm 33mm 49.5mm - - - -
RS Stock No. 456-1896
BrandRS PRO
MYR100.20
Each
units
Adapter RJ45 Female, RJ45 Male Cat5e - - - 22.1mm 47mm 191.8mm - - - -
RS Stock No. 186-3054
BrandRS PRO
MYR11.79
Each
units
Coupler RJ45 Cat3 - UTP Crossed 22.02mm 16mm 37.3mm - - - -
RS Stock No. 314-8111
BrandRS PRO
MYR21.93
Each
units
Adapter 9 Way D-sub Female, RJ45 Female - - - - 16mm 33mm 50mm - - - -
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