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. 768-4422
Mfr. Part No.EHRJ45P6S
MYR77.62
Each
units
Adapter RJ45 Cat6 - - - 26mm 31mm 30mm - - - -
RS Stock No. 186-3111
BrandRS PRO
MYR65.26
Each
units
Modular Coupler RJ45 - 2 Shielded Straight Through 18.54mm 21mm 27.46mm - - - -
RS Stock No. 916-0259
BrandRS PRO
MYR54.54
Each
units
Feedthrough Connector RJ45 Cat6 2 FTP - - 26mm - - - FT -
RS Stock No. 340-9630
BrandRS PRO
MYR39.56
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 186-3149
BrandRS PRO
MYR28.09
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 186-3048
BrandRS PRO
MYR17.44
Each
units
Coupler RJ45 Cat3 - UTP Straight Through 22.02mm 16mm 37.3mm - - - -
RS Stock No. 886-0434
Mfr. Part No.40-9538F
MYR11.108
Each (In a Pack of 10)
units
D-Sub Modular Adapter Kit DB9, RJ45 - 1 (RJ45) - Straight Through - - - - - - 40
RS Stock No. 340-9624
BrandRS PRO
MYR29.90
Each
units
Coupler RJ45 Female Cat5 - UTP Straight Through 17.3mm 16.3mm 28mm - - - -
RS Stock No. 186-3133
BrandRS PRO
MYR11.62
Each
units
Coupler RJ11 - 2 Unshielded Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 186-3155
BrandRS PRO
MYR14.75
Each
units
Extender RJ11 Female, RJ11 Male Cat3 1 - - - - - - 2 m - -
RS Stock No. 186-3032
BrandRS PRO
MYR10.61
Each
units
Coupler RJ11 Cat3 - UTP Straight Through 22mm 16mm 37.3mm - - - -
RS Stock No. 909-3714
Mfr. Part No.NE8FDP-B
BrandNeutrik
MYR51.03
Each
units
Adapter RJ45 Female Cat5e 2 Unshielded - 31mm 26mm 34.55mm 24 mm - EtherCon -
RS Stock No. 875-5641
Mfr. Part No.20821010010
BrandHARTING
MYR97.84
Each
units
Plug RJ45 - 1 - Crossed 14.4mm 18.6mm 47.35mm - - Ha-VIS preLink 2082101
RS Stock No. 619-5491
Mfr. Part No.PX0839/IDC
BrandBulgin
MYR155.65
Each
units
Coupler RJ45 Cat5e 1 Shielded - 37.7mm 42mm 45mm - - Buccaneer -
RS Stock No. 907-5668
BrandRS PRO
MYR36.78
Each
units
- - Cat6 - FTP - - - - - - FT -
RS Stock No. 741-7317
Mfr. Part No.IE-PS-RJ45-FH-BK -1963600000
BrandWeidmuller
MYR113.11
Each
units
Field Installation Plug RJ45 Cat6a 1 STP - 9.45mm 12.9mm 51.32mm - - - -
RS Stock No. 916-0255
BrandRS PRO
MYR31.96
Each
units
Feedthrough Connector RJ45 Cat6 2 UTP - - 26mm - - - FT -
RS Stock No. 382-2689
BrandRS PRO
MYR14.52
Each
units
Adapter 9 Way D-Sub Plug/RJ45 Socket - - Shielded - 49.5mm 33mm 15mm - - - -
RS Stock No. 907-5665
BrandRS PRO
MYR34.15
Each
units
- - Cat6 - UTP - - - - - - FT -
RS Stock No. 821-2911
Mfr. Part No.MH3101-8821
MYR12.83
Each
units
Coupler RJ45 - 1 UTP - 18.54mm 16.13mm 26.96mm - - MH3101 MH3101-8821
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