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. 741-7348
Mfr. Part No.IE-BS-V04P-RJ45-C -1963490000
BrandWeidmuller
TWD823.00
Each
units
Coupler RJ45 Cat6a - STP - - - - - - - -
RS Stock No. 821-2939
Mfr. Part No.MH3101S-CAT6A
TWD421.00
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
TWD668.00
Each
units
Field Installation Plug RJ45 Cat6a 1 STP - 9.45mm 12.9mm 51.32mm - - - -
RS Stock No. 186-3149
BrandRS PRO
TWD88.00
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 186-3105
BrandRS PRO
TWD135.00
Each
units
Adapter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 818-700
BrandRS PRO
TWD105.00
Each
units
Adapter RJ45, 9 Way D-sub Female - 1 Unshielded - 15mm 33mm 49.5mm - - - -
RS Stock No. 821-2936
Mfr. Part No.MH3101-CAT6
TWD196.00
Each
units
Coupler RJ45 Cat6 1 UTP - 16.6mm 16.2mm 29.8mm - - MH3101 MH3101-CAT6
RS Stock No. 340-9630
BrandRS PRO
TWD117.00
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 314-8161
BrandRS PRO
TWD88.00
Each
units
Adapter RJ45 Female, 25 Way D-sub Male - - - - 16mm 55mm 40mm - - - -
RS Stock No. 818-693
BrandRS PRO
TWD127.00
Each
units
Adapter RJ45, 9 Way D-sub Male - 1 Unshielded - 15mm 33mm 49.5mm - - - -
RS Stock No. 909-3714
Mfr. Part No.NE8FDP-B
BrandNeutrik
TWD436.00
Each
units
Adapter RJ45 Female Cat5e 2 Unshielded - 31mm 26mm 34.55mm 24 mm - EtherCon -
RS Stock No. 314-8155
BrandRS PRO
TWD94.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 818-665
BrandRS PRO
TWD104.00
Each
units
Adapter RJ11, 9 Way D-sub Female - - Unshielded - 15mm 33mm 49.5mm - - - -
RS Stock No. 821-2927
Mfr. Part No.MH3101S-CAT5E
TWD195.00
Each
units
Coupler RJ45 Cat5e 1 STP - 18.54mm 16.13mm 27.46mm - - MH3101 MH3101S-CAT5E
RS Stock No. 186-3111
BrandRS PRO
TWD266.00
Each
units
Modular Coupler RJ45 - 2 Shielded Straight Through 18.54mm 21mm 27.46mm - - - -
RS Stock No. 360-7115
BrandRS PRO
TWD179.00
Each
units
Coupler RJ45 Male Cat5e - UTP Straight Through 19.6mm 23mm 32.5mm - - - -
RS Stock No. 314-8234
BrandRS PRO
TWD86.00
Each
units
Adapter RJ45 Female, 9 Way D-sub Female - - - - 16mm 33mm 50mm - - - -
RS Stock No. 314-8240
BrandRS PRO
TWD88.00
Each
units
Adapter RJ45 Female, 25 Way D-sub Male - - - - 16mm 55mm 40mm - - - -
RS Stock No. 818-716
BrandRS PRO
TWD94.00
Each
units
Adapter RJ45, 25 Way D-sub Male - - Unshielded - 15mm 55.1mm 39mm - - - -
RS Stock No. 382-2689
BrandRS PRO
TWD108.00
Each
units
Adapter 9 Way D-Sub Plug/RJ45 Socket - - Shielded - 49.5mm 33mm 15mm - - - -