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 CAD Drawing Width Depth Diameter Extension Length Series Series Number
RS Stock No. 741-7348
Mfr. Part No.IE-BS-V04P-RJ45-C -1963490000
BrandWeidmuller
TWD823
Each
units
Coupler RJ45 Cat6a - STP - - - - - - - - -
RS Stock No. 821-2939
Mfr. Part No.MH3101S-CAT6A
TWD465
Each
units
Coupler RJ45 Cat6a 1 STP - 16.8mm - 16.1mm 30mm - - MH3101 MH3101S-CAT6A
RS Stock No. 741-7317
Mfr. Part No.IE-PS-RJ45-FH-BK -1963600000
BrandWeidmuller
TWD668
Each
units
Field Installation Plug RJ45 Cat6a 1 STP - 9.45mm - 12.9mm 51.32mm - - - -
RS Stock No. 821-2936
Mfr. Part No.MH3101-CAT6
TWD275
Each
units
Coupler RJ45 Cat6 1 UTP - 16.6mm - 16.2mm 29.8mm - - MH3101 MH3101-CAT6
RS Stock No. 186-3105
BrandRS Pro
TWD135
Each
units
Adapter RJ45 - 2 - Straight Through 21mm - 26mm 36mm - - - -
RS Stock No. 818-700
BrandRS Pro
TWD105
Each
units
Adapter RJ45, 9 Way D-sub Female - 1 Unshielded - 15mm - 33mm 49.5mm - - - -
RS Stock No. 186-3149
BrandRS Pro
TWD73
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm - 14.48mm 26.96mm - - - -
RS Stock No. 314-8161
BrandRS Pro
TWD88
Each
units
Adapter RJ45 Female, 25 Way D-sub Male - - - - 16mm - 55mm 40mm - - - -
RS Stock No. 818-693
BrandRS Pro
TWD127
Each
units
Adapter RJ45, 9 Way D-sub Male - 1 Unshielded - 15mm - 33mm 49.5mm - - - -
RS Stock No. 314-8155
BrandRS Pro
TWD94
Each
units
Adapter RJ45 Female, 9 Way D-sub Female - - - - 16mm - 33mm 50mm - - - -
RS Stock No. 821-2927
Mfr. Part No.MH3101S-CAT5E
TWD195
Each
units
Coupler RJ45 Cat5e 1 STP - 18.54mm - 16.13mm 27.46mm - - MH3101 MH3101S-CAT5E
RS Stock No. 909-3714
Mfr. Part No.NE8FDP-B
BrandNeutrik
TWD454
Each
units
Adapter RJ45 Female Cat5e 2 Unshielded - 31mm - 26mm 34.55mm 24 mm - EtherCon -
RS Stock No. 818-665
BrandRS Pro
TWD104
Each
units
Adapter RJ11, 9 Way D-sub Female - - Unshielded - 15mm - 33mm 49.5mm - - - -
RS Stock No. 186-3111
BrandRS Pro
TWD266
Each
units
Modular Coupler RJ45 - 2 Shielded Straight Through 18.54mm - 21mm 27.46mm - - - -
RS Stock No. 340-9630
BrandRS Pro
TWD117
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm - 25mm 45mm - - - -
RS Stock No. 765-9034
Mfr. Part No.09454521560
BrandHarting
TWD885
Each
units
Coupler RJ45 Socket/RJ45 Socket Cat6 1 Shielded - - - - 35.9mm - - - -
RS Stock No. 724-8953
Mfr. Part No.RJ45-PCBUNIT
TWD602
Each
units
PCB Unit RJ45, Screw Terminal - - - - - - - - - - - -
RS Stock No. 818-716
BrandRS Pro
TWD94
Each
units
Adapter RJ45, 25 Way D-sub Male - - Unshielded - 15mm - 55.1mm 39mm - - - -
RS Stock No. 314-8177
BrandRS Pro
TWD86
Each
units
Adapter RJ45 Female, 25 Way D-sub Female - - - - 16mm - 55mm 40mm - - - -
RS Stock No. 130-2310
Mfr. Part No.1419022
TWD783
Each
units
Coupler RJ45 Female Cat6 2 - Straight Through 23mm - 28.8mm 18mm - - CUC-F-D1ZNI-S -