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. 400-9023
BrandRS PRO
£22.35
Each
Units
T-Adapter RJ45 Cat5 2 Shielded Straight Through - - - - 150 mm - -
RS Stock No. 907-5668
BrandRS PRO
£7.78
Each
Units
Feedthrough Connector RJ45 Cat6 - FTP - - 26mm - - - FT -
RS Stock No. 916-0252
BrandRS PRO
£7.50
Each
Units
Feedthrough Connector RJ45 Cat5e 2 FTP - - 26mm - - - FT -
RS Stock No. 907-5665
BrandRS PRO
£7.35
Each
Units
Feedthrough Connector RJ45 Cat6 - UTP - - 26mm - - - FT -
RS Stock No. 314-8206
BrandRS PRO
£2.79
Each
Units
Adapter 25 Way D-sub Male, RJ45 Female - - - - 16mm 55mm 40mm - - - -
RS Stock No. 907-5652
BrandRS PRO
£6.08
Each
Units
Feedthrough Connector RJ45 Cat5e - UTP - - 26mm - - - FT -
RS Stock No. 370-5196
BrandRS PRO
£4.60
Each
Units
Adapter 25 Way D-Sub Plug/RJ45 Socket - - Shielded - 39mm 55.1mm 15mm - - - -
RS Stock No. 314-8161
BrandRS PRO
£4.31
Each
Units
Adapter 25 Way D-sub Male, RJ45 Female - - - - 16mm 55mm 40mm - - - -
RS Stock No. 625-6259
BrandRS PRO
£4.62
Each
Units
Adapter RJ45 Socket/25 Way D Plug - - - - 45mm 53mm 20mm - - - -
RS Stock No. 400-9017
BrandRS PRO
£18.69
Each
Units
T-Adapter RJ45 Cat5 2 Unshielded Straight Through - - - - 150 mm - -
RS Stock No. 314-8234
BrandRS PRO
£4.63
Each
Units
Adapter 9 Way D-sub Female, RJ45 Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 314-8183
BrandRS PRO
£4.74
Each
Units
Adapter 9 Way D-sub Male, RJ45 Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 818-671
BrandRS PRO
£2.26
Each
Units
Adapter 25 Way D-sub Male, RJ11 - - - - 15mm 55.1mm 39mm - - - -
RS Stock No. 818-687
BrandRS PRO
£3.19
Each
Units
Adapter 25 Way D-sub Female, RJ11 - - Unshielded - 15mm 55.1mm 39mm - - - -
RS Stock No. 314-8199
BrandRS PRO
£4.96
Each
Units
Adapter 9 Way D-sub Female, RJ45 Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 314-8127
BrandRS PRO
£2.09
Each
Units
Adapter 25 Way D-sub Male, RJ45 Female - - - - 16mm 55mm 40mm - - - -
RS Stock No. 818-722
BrandRS PRO
£2.97
Each
Units
Adapter 25 Way D-sub Female, RJ45 - - Unshielded - 15mm 55.1mm 39mm - - - -
RS Stock No. 314-8228
BrandRS PRO
£4.63
Each
Units
Adapter 9 Way D-sub Male, RJ45 Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 314-8177
BrandRS PRO
£4.21
Each
Units
Adapter 25 Way D-sub Female, RJ45 Female - - - - 16mm 55mm 40mm - - - -
RS Stock No. 874-1263
BrandRS PRO
£3.71
Each
Units
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