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. 340-9630
BrandRS PRO
SGD10.73
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 186-3149
BrandRS PRO
SGD6.42
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 340-9624
BrandRS PRO
SGD11.07
Each
units
Coupler RJ45 Female Cat5 - UTP Straight Through 17.3mm 16.3mm 28mm - - - -
RS Stock No. 186-3048
BrandRS PRO
SGD7.11
Each
units
Coupler RJ45 Cat3 - UTP Straight Through 22.02mm 16mm 37.3mm - - - -
RS Stock No. 186-3098
BrandRS PRO
SGD6.57
Each
units
Splitter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 186-3111
BrandRS PRO
SGD15.55
Each
units
Modular Coupler RJ45 - 2 Shielded Straight Through 18.54mm 21mm 27.46mm - - - -
RS Stock No. 340-9646
BrandRS PRO
SGD8.15
Each
units
Wiring Box Punch Down Cat5e 2 UTP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 340-9652
BrandRS PRO
SGD6.75
Each
units
Wiring Box Punch Down Cat5 2 STP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 186-3105
BrandRS PRO
SGD5.51
Each
units
Adapter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 818-693
BrandRS PRO
SGD5.33
Each
units
Adapter 9 Way D-sub Male, RJ45 - 1 Unshielded - 15mm 33mm 49.5mm - - - -
RS Stock No. 360-7115
BrandRS PRO
SGD10.00
Each
units
Coupler RJ45 Male Cat5e - UTP Straight Through 19.6mm 23mm 32.5mm - - - -
RS Stock No. 916-0243
BrandRS PRO
SGD8.28
Each
units
Feedthrough Connector RJ45 Female Cat5e 2 UTP - - 26mm - - - FT -
RS Stock No. 186-3082
BrandRS PRO
SGD5.32
Each
units
Adapter RJ11 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 818-700
BrandRS PRO
SGD5.71
Each
units
Adapter 9 Way D-sub Female, RJ45 - 1 Unshielded - 15mm 33mm 49.5mm - - - -
RS Stock No. 907-5668
BrandRS PRO
SGD12.11
Each
units
- - Cat6 - FTP - - - - - - FT -
RS Stock No. 186-3076
BrandRS PRO
SGD7.98
Each
units
Adapter RJ11 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 186-3054
BrandRS PRO
SGD6.30
Each
units
Coupler RJ45 Cat3 - UTP Crossed 22.02mm 16mm 37.3mm - - - -
RS Stock No. 186-3133
BrandRS PRO
SGD5.06
Each
units
Coupler RJ11 - 2 Unshielded Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 456-1896
BrandRS PRO
SGD30.08
Each
units
Adapter RJ45 Female, RJ45 Male Cat5e - - - 22.1mm 47mm 191.8mm - - - -
RS Stock No. 111-6746
BrandRS PRO
SGD18.62
Each
units
Coupler RJ45 Female - 1 Shielded Straight Through - 29.1mm 38.2mm - - GTC Sealed GTC Sealed
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