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 Voltage Rating
RS Stock No. 314-8234
BrandRS PRO
TWD86.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Female - - - - 16mm 33mm 50mm - - - - -
RS Stock No. 314-8199
BrandRS PRO
TWD92.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Female - - - - 16mm 33mm 50mm - - - - -
RS Stock No. 340-9652
BrandRS PRO
TWD128.00
Each
units
Wiring Box Punch Down Cat5 2 STP Straight Through 25mm 25mm 45mm - - - - -
RS Stock No. 314-8177
BrandRS PRO
TWD86.00
Each
units
Adapter RJ45 Female, 25 Way D-sub Female - - - - 16mm 55mm 40mm - - - - -
RS Stock No. 695-0210
Mfr. Part No.RJ11F21G
BrandAmphenol
TWD1,979.00
Each
units
Adapter RJ11 Female - 6 UTP Straight Through 39.7mm 28.6mm 28.6mm - - RJ11Field RJ11F21G -
RS Stock No. 360-7115
BrandRS PRO
TWD179.00
Each
units
Coupler RJ45 Male Cat5e - UTP Straight Through 19.6mm 23mm 32.5mm - - - - -
RS Stock No. 186-3076
BrandRS PRO
TWD102.00
Each
units
Adapter RJ11 - 2 - Straight Through 21mm 26mm 36mm - - - - -
RS Stock No. 875-5641
Mfr. Part No.20821010010
BrandHARTING
TWD449.00
Each
units
Plug RJ45 - 1 - Crossed 14.4mm 18.6mm 47.35mm - - Ha-VIS preLink 2082101 -
RS Stock No. 314-8149
BrandRS PRO
TWD94.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Male - - - - 16mm 33mm 50mm - - - - -
RS Stock No. 821-2920
Mfr. Part No.MH3101S-8821
TWD206.00
Each
units
Coupler RJ45 - 1 STP - 18.54mm 16.13mm 27.46mm - - MH3101 MH3101S-8821 -
RS Stock No. 821-2923
Mfr. Part No.MH3101-CAT5E
TWD110.00
Each
units
Coupler RJ45 Cat5e 1 UTP - 18.54mm 16.13mm 26.96mm - - MH3101 MH3101-CAT5E -
RS Stock No. 818-716
BrandRS PRO
TWD94.00
Each
units
Adapter RJ45, 25 Way D-sub Male - - Unshielded - 15mm 55.1mm 39mm - - - - -
RS Stock No. 314-8228
BrandRS PRO
TWD86.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Male - - - - 16mm 33mm 50mm - - - - -
RS Stock No. 314-8183
BrandRS PRO
TWD88.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Male - - - - 16mm 33mm 50mm - - - - -
RS Stock No. 724-8953
Mfr. Part No.RJ45-PCBUNIT
TWD682.00
Each
units
PCB Unit RJ45, Screw Terminal - - - - - - - - - - - -
RS Stock No. 186-3133
BrandRS PRO
TWD67.00
Each
units
Coupler RJ11 - 2 Unshielded Straight Through 20.55mm 14.48mm 26.96mm - - - - -
RS Stock No. 130-2310
Mfr. Part No.1419022
TWD783.00
Each
units
Coupler RJ45 Female Cat6 2 - Straight Through 23mm 28.8mm 18mm - - CUC-F-D1ZNI-S/R4GC8 - -
RS Stock No. 186-3155
BrandRS PRO
TWD98.00
Each
units
Extender RJ11 Female, RJ11 Male Cat3 1 - - - - - - 2 m - - -
RS Stock No. 340-9646
BrandRS PRO
TWD118.00
Each
units
Wiring Box Punch Down Cat5e 2 UTP Straight Through 25mm 25mm 45mm - - - - -
RS Stock No. 619-5491
Mfr. Part No.PX0839/IDC
BrandBulgin
TWD751.00
Each
units
Coupler RJ45 Cat5e 1 Shielded - 37.7mm 42mm 45mm - - Buccaneer - -