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. 314-8127
BrandRS PRO
$3.09
Each
units
Adapter 25 Way D-sub Male, RJ45 Female - - - - 16mm 55mm 40mm - - - -
RS Stock No. 314-8183
BrandRS PRO
$10.44
Each
units
Adapter 9 Way D-sub Male, RJ45 Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 314-8199
BrandRS PRO
$8.55
Each
units
Adapter 9 Way D-sub Female, RJ45 Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 886-0434
Mfr. Part No.40-9538F
$4.457
Each (In a Pack of 10)
units
D-Sub Modular Adapter Kit DB9, RJ45 - 1 (RJ45) - Straight Through - - - - - - 40
RS Stock No. 768-4428
Mfr. Part No.EHRJ45P6RS
$18.91
Each
units
Adapter RJ45 Cat6 - - - 26mm 31mm 30mm - - - -
RS Stock No. 765-9084
Mfr. Part No.09454521504
BrandHARTING
$60.52
Each
units
Coupler RJ45 Plug/RJ45 Socket Cat6 1 Shielded Straight Through 500mm - - 27.9mm - - -
RS Stock No. 619-5479
Mfr. Part No.PX0839/PC
BrandBulgin
$17.32
Each
units
Coupler RJ45 Cat5e 1 - - - - 45mm 35.7mm - Buccaneer -
RS Stock No. 765-9034
Mfr. Part No.09454521560
BrandHARTING
$34.30
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
$49.83
Each
units
Coupler RJ45 Cat6a 2 STP - - - 34.7mm 30mm - - -
RS Stock No. 875-5565
Mfr. Part No.09454521561
BrandHARTING
$31.05
Each
units
Coupler RJ45 - 1 - - 35.9mm - - 27.9mm - Har-Port 0945452
RS Stock No. 648-6674
Mfr. Part No.1689064
$8.97
Each
units
Modular Coupler RJ45 Cat5e 1 Shielded - 21.6mm - 34.5mm - - VS-08-BU-RJ45/BU -
RS Stock No. 909-3714
Mfr. Part No.NE8FDP-B
BrandNeutrik
$19.26
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
$12.36
Each
units
Coupler RJ45 Cat6 1 UTP - 16.6mm 16.2mm 29.8mm - - MH3101 MH3101-CAT6
RS Stock No. 333-6649
Mfr. Part No.DBFB8812
$41.28
Each
units
Splitter RJ45 Female, RJ45 Male Cat5e 2 Shielded - - - - - 250 mm - -
RS Stock No. 741-7317
Mfr. Part No.IE-PS-RJ45-FH-BK -1963600000
BrandWeidmuller
$47.94
Each
units
Field Installation Plug RJ45 Cat6a 1 STP - 9.45mm 12.9mm 51.32mm - - - -
RS Stock No. 124-2520
Mfr. Part No.CLB-JL45
$13.72
Each
units
Adapter RJ45, Terminal Block - 8 - Straight Through - - - - - - -
RS Stock No. 724-8953
Mfr. Part No.RJ45-PCBUNIT
$50.08
Each
units
PCB Unit RJ45, Screw Terminal - - - - - - - - - - -
RS Stock No. 765-9785
Mfr. Part No.PXP6033TP
BrandBulgin
$65.01
Each
units
Coupler RJ45 Male Cat5e - STP - 49.2mm - - 32mm - Buccaneer -
RS Stock No. 821-2939
Mfr. Part No.MH3101S-CAT6A
$22.46
Each
units
Coupler RJ45 Cat6a 1 STP - 16.8mm 16.1mm 30mm - - MH3101 MH3101S-CAT6A
RS Stock No. 765-9031
Mfr. Part No.09455451560
BrandHARTING
$27.31
Each
units
Coupler RJ45 Socket/RJ45 Socket Cat6 - Shielded - 13.25mm 15.7mm 34.5mm - - - -
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