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. 765-9088
Mfr. Part No.09454521510
BrandHARTING
HK$332.90
Each
units
Coupler RJ45 Plug/RJ45 Socket Cat6 - - Straight Through 1.5m - - - - - -
RS Stock No. 186-3149
BrandRS PRO
HK$40.38
Each
units
Coupler RJ45 - 2 UTP Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 765-9034
Mfr. Part No.09454521560
BrandHARTING
HK$162.01
Each
units
Coupler RJ45 Socket/RJ45 Socket Cat6 1 Shielded - - - 35.9mm - - - -
RS Stock No. 875-5604
Mfr. Part No.20820010002
BrandHARTING
HK$96.59
Each
units
HIFF Jack RJ45 - 1 - Crossed 15.6mm 13.15mm 41mm - - Ha-VIS preLink 2082001
RS Stock No. 340-9624
BrandRS PRO
HK$59.42
Each
units
Coupler RJ45 Female Cat5 - UTP Straight Through 17.3mm 16.3mm 28mm - - - -
RS Stock No. 186-3048
BrandRS PRO
HK$35.60
Each
units
Coupler RJ45 Cat3 - UTP Straight Through 22.02mm 16mm 37.3mm - - - -
RS Stock No. 186-3133
BrandRS PRO
HK$23.45
Each
units
Coupler RJ11 - 2 Unshielded Straight Through 20.55mm 14.48mm 26.96mm - - - -
RS Stock No. 619-5479
Mfr. Part No.PX0839/PC
BrandBulgin
HK$76.42
Each
units
Coupler RJ45 Cat5e 1 - - - - 45mm 35.7mm - Buccaneer -
RS Stock No. 340-9630
BrandRS PRO
HK$64.07
Each
units
Coupler RJ45 Female Cat5 - STP Straight Through 25mm 25mm 45mm - - - -
RS Stock No. 186-3161
BrandRS PRO
HK$46.84
Each
units
Extender RJ45 Female, RJ45 Male Cat3 1 - - - - - - 2 m - -
RS Stock No. 360-7115
BrandRS PRO
HK$64.86
Each
units
Coupler RJ45 Male Cat5e - UTP Straight Through 19.6mm 23mm 32.5mm - - - -
RS Stock No. 625-6209
BrandRS PRO
HK$37.99
Each
units
Adapter RJ11 - - - Straight Through 18mm 45mm 28mm - - - -
RS Stock No. 186-3155
BrandRS PRO
HK$36.64
Each
units
Extender RJ11 Female, RJ11 Male Cat3 1 - - - - - - 2 m - -
RS Stock No. 765-9084
Mfr. Part No.09454521504
BrandHARTING
HK$270.50
Each
units
Coupler RJ45 Plug/RJ45 Socket Cat6 1 Shielded Straight Through 500mm - - 27.9mm - - -
RS Stock No. 186-3098
BrandRS PRO
HK$36.19
Each
units
Splitter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 186-3105
BrandRS PRO
HK$13.44
Each
units
Adapter RJ45 - 2 - Straight Through 21mm 26mm 36mm - - - -
RS Stock No. 765-9031
Mfr. Part No.09455451560
BrandHARTING
HK$142.22
Each
units
Coupler RJ45 Socket/RJ45 Socket Cat6 - Shielded - 13.25mm 15.7mm 34.5mm - - - -
RS Stock No. 619-5491
Mfr. Part No.PX0839/IDC
BrandBulgin
HK$170.41
Each
units
Coupler RJ45 Cat5e 1 Shielded - 37.7mm 42mm 45mm - - Buccaneer -
RS Stock No. 885-7696
Mfr. Part No.30-9242
HK$78.93
Each
units
Coupler RJ45 Female Cat5e 1 Shielded Straight Through 25mm 23.5mm 47mm - - - 30
RS Stock No. 818-700
BrandRS PRO
HK$31.16
Each
units
Adapter RJ45, 9 Way D-sub Female - 1 Unshielded - 15mm 33mm 49.5mm - - - -
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