Ethernet Couplers

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. 818-671
BrandRS PRO
SGD4.66
Each
units
Adapter RJ11, 25 Way D-sub Male - - - - 15mm 55.1mm 39mm - - - - -
RS Stock No. 907-5665
BrandRS PRO
SGD11.38
Each
units
- - Cat6 - UTP - - - - - - FT - -
RS Stock No. 818-722
BrandRS PRO
SGD6.13
Each
units
Adapter RJ45, 25 Way D-sub Female - - Unshielded - 15mm 55.1mm 39mm - - - - -
RS Stock No. 111-6747
BrandRS PRO
SGD25.88
Each
units
90° Coupler RJ45 Female - - Shielded - 36.9mm 29.1mm 36.2mm - - GTC Sealed GTC Sealed -
RS Stock No. 843-6429
Mfr. Part No.09452151107
BrandHARTING
SGD94.31
Each
units
Coupler RJ45 Male Cat5 1 UTP Straight Through 40mm - 66.6mm - - HAN 3A RJ45 0945 -
RS Stock No. 186-3032
BrandRS PRO
SGD7.21
Each
units
Coupler RJ11 Cat3 - UTP Straight Through 22mm 16mm 37.3mm - - - - -
RS Stock No. 818-716
BrandRS PRO
SGD6.13
Each
units
Adapter RJ45, 25 Way D-sub Male - - Unshielded - 15mm 55.1mm 39mm - - - - -
RS Stock No. 818-687
BrandRS PRO
SGD6.58
Each
units
Adapter RJ11, 25 Way D-sub Female - - Unshielded - 15mm 55.1mm 39mm - - - - -
RS Stock No. 625-6192
BrandRS PRO
SGD10.08
Each
units
Adapter RJ11 Socket/9 Way D Plug - - - - 45mm 28mm 18mm - - - - -
RS Stock No. 848-5437
Mfr. Part No.CMBAEIY
BrandPanduit
SGD23.35
Each
units
BNC Coupler Module - - - - Straight Through 45.2mm 15.4mm 18.3mm - - CMBA - -
RS Stock No. 916-0255
BrandRS PRO
SGD14.68
Each
units
Feedthrough Connector RJ45 Cat6 2 UTP - - 26mm - - - FT - -
RS Stock No. 695-0210
Mfr. Part No.RJ11F21G
BrandAmphenol
SGD115.73
Each
units
Adapter RJ11 Female - 6 UTP Straight Through 39.7mm 28.6mm 28.6mm - - RJ11Field RJ11F21G -
RS Stock No. 292-8893
Mfr. Part No.TA1034P4CD
SGD17.67
Each
units
- - - - - - - - - - - - - -
RS Stock No. 314-8183
BrandRS PRO
SGD9.50
Each
units
Adapter RJ45 Female, 9 Way D-sub Male - - - - 16mm 33mm 50mm - - - - -
RS Stock No. 765-9084
Mfr. Part No.09454521504
BrandHARTING
SGD64.74
Each
units
Coupler RJ45 Plug/RJ45 Socket Cat6 1 Shielded Straight Through 500mm - - 27.9mm - - - -
RS Stock No. 875-5648
Mfr. Part No.20821040001
BrandHARTING
SGD45.03
Each
units
Plug RJ45 Cat6a - STP - 22.5mm 30mm 71mm - - Ha-VIS preLink 2082104 -
RS Stock No. 765-9965
Mfr. Part No.PXM6033TP
BrandBulgin
SGD68.76
Each
units
Coupler RJ45 Male Cat5e - STP - 42.2mm - - 32mm - Buccaneer - -
RS Stock No. 765-9785
Mfr. Part No.PXP6033TP
BrandBulgin
SGD70.23
Each
units
Coupler RJ45 Socket Cat5e 2 STP Straight Through 49.2mm - - 32mm - Buccaneer 6000 -
RS Stock No. 875-5641
Mfr. Part No.20821010010
BrandHARTING
SGD28.87
Each
units
Plug RJ45 - 1 - Crossed 14.4mm 18.6mm 47.35mm - - Ha-VIS preLink 2082101 -
RS Stock No. 818-665
BrandRS PRO
SGD5.74
Each
units
Adapter RJ11, 9 Way D-sub Female - - Unshielded - 15mm 33mm 49.5mm - - - - -