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. 340-9630
BrandRS PRO
$11.41
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm 25mm 45mm - - - - -
RS Stock No. 886-0434
Mfr. Part No.40-9538F
$5.218
Each (In a Pack of 10)
units
D-Sub Modular Adapter Kit DB9, RJ45 - 1 (RJ45) - Straight Through - - - - - - 40 -
RS Stock No. 111-6746
BrandRS PRO
$27.56
Each
units
Coupler RJ45 Female - 1 Shielded Straight Through - 29.1mm 38.2mm - - GTC Sealed GTC Sealed -
RS Stock No. 340-9624
BrandRS PRO
$14.18
Each
units
Coupler RJ45 Female Cat5 - UTP Straight Through 17.3mm 16.3mm 28mm - - - - -
RS Stock No. 768-4428
Mfr. Part No.EHRJ45P6
$19.32
Each
units
Adapter RJ45 Cat6 - - - 26mm 31mm 30mm - - - - -
RS Stock No. 765-9084
Mfr. Part No.09454521504
BrandHARTING
$67.94
Each
units
Coupler RJ45 Plug/RJ45 Socket Cat6 1 Shielded Straight Through 500mm - - 27.9mm - - - -
RS Stock No. 916-0252
BrandRS PRO
$16.79
Each
units
Feedthrough Connector RJ45 Cat5e 2 FTP - - 26mm - - - FT - -
RS Stock No. 619-5479
Mfr. Part No.PX0839/PC
BrandBulgin
$28.52
Each
units
Coupler RJ45 Cat5e 1 - - - - 45mm 35.7mm - Buccaneer - -
RS Stock No. 186-3098
BrandRS PRO
$13.00
Each
units
Splitter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - - -
RS Stock No. 765-9034
Mfr. Part No.09454521560
BrandHARTING
$62.51
Each
units
Coupler RJ45 Socket/RJ45 Socket Cat6 1 Shielded - - - 35.9mm - - - - -
RS Stock No. 741-7326
Mfr. Part No.IE-FCM-RJ45-C -1018790000
BrandWeidmuller
$55.68
Each
units
Coupler RJ45 Cat6a 2 STP - - - 34.7mm 30mm - - - -
RS Stock No. 186-3149
BrandRS PRO
$8.67
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm 14.48mm 26.96mm - - - - -
RS Stock No. 875-5565
Mfr. Part No.09454521561
BrandHARTING
$34.11
Each
units
Coupler RJ45 - 1 - - 35.9mm - - 27.9mm - Har-Port 0945452 -
RS Stock No. 186-3048
BrandRS PRO
$9.58
Each
units
Coupler RJ45 Cat3 - UTP Straight Through 22.02mm 16mm 37.3mm - - - - -
RS Stock No. 340-9646
BrandRS PRO
$9.83
Each
units
Wiring Box Punch Down Cat5e 2 UTP Straight Through 25mm 25mm 45mm - - - - -
RS Stock No. 648-6674
Mfr. Part No.1689064
$21.60
Each
units
Modular Coupler RJ45 Cat5e 1 Shielded - 21.6mm - 34.5mm - - VS-08-BU-RJ45/BU - -
RS Stock No. 916-0243
BrandRS PRO
$12.42
Each
units
Feedthrough Connector RJ45 Female Cat5e 2 UTP - - 26mm - - - FT - -
RS Stock No. 111-6747
BrandRS PRO
$28.07
Each
units
90° Coupler RJ45 Female - - Shielded - 36.9mm 29.1mm 36.2mm - - GTC Sealed GTC Sealed -
RS Stock No. 909-3714
Mfr. Part No.NE8FDP-B
BrandNeutrik
$20.04
Each
units
Adapter RJ45 Female Cat5e 2 Unshielded - 31mm 26mm 34.55mm 24 mm - EtherCon - -
RS Stock No. 821-2936
Mfr. Part No.MH3101-CAT6
$12.55
Each
units
Coupler RJ45 Cat6 1 UTP - 16.6mm 16.2mm 29.8mm - - MH3101 MH3101-CAT6 -