Modular (RJ) & Telecom Connectors

KSM stock and supply a variety of RJ (registered jack) modular and telecoms connectors. Originally designed for telephone wiring, these connectors are now used for a number of purposes. They are probably best known for their use in twisted-pair Ethernet (Cat5e, Cat6 etc), telephone handsets and router cables.

RJ Connectors

A range of modular connectors for telecoms and Ethernet applications. For general reference we use the most common naming terminology for each connector, though this may be strictly inaccurate. If in doubt we recommend referring to the connectors using the number of positions and contacts, e.g. 8P8C for an RJ45 connector.

RJ45 Shielded Plug
KSM Part Number Alt. Reference Description Downloads
D01-4M0U0 RJ9/RJ10 Unshielded 4P4C RJ22 Modular Plug Datasheet
D01-2M0U0 RJ14 Unshielded 6P4C RJ11 Modular Plug Datasheet
D01-3M0U0 RJ25 Unshielded 6P6C RJ12 Modular Plug Datasheet
D01-1M5UT Unshielded 8P8C RJ45 Modular Plug for Cat5e Stranded Datasheet
D01-1M5ST Shielded 8P8C RJ45 Modular Plug for Cat5e Stranded Datasheet
D01-1M6UT Unshielded 8P8C RJ45 Modular Plug for Cat6/Cat6A Stranded Datasheet
D01-1M6ST Shielded 8P8C RJ45 Modular Plug for Cat6/Cat6A Stranded Datasheet
D01-6M0UT RJ50 Unshielded 10P10C RJ48 Modular Plug Flat Entry Datasheet

Boots for RJ Modular Plugs

Snagless strain relief boots for 8P8C RJ45 connectors, available in a range of colours and cable entry sizes.

Standard colours available for 6mm entry are Black, Blue, Brown, Green, Grey, Orange, Pink, Red, Violet, White and Yellow (Note: Brown is not available for flush 6mm entry. Brown, Orange, Pink and White are not available for 6.5mm entry).

Colour is denoted by xx in partcode.

A selection of RJ45 bubble boots
KSM Part Number Description
D10-A0045A/xx RJ45 Strain Relief Boot 6mm Entry
D10-A0045C/xx RJ45 Strain Relief Boot 6.5mm Entry
D10-A0045F/xx RJ45 Strain Relief Flush Boot 6mm Entry

Telecom Connectors

Available in 4 and 6 way versions these connectors are standardised in BS 6312 for use with British telephone sockets.

BT-431a and BT-631a 4 and 6 way plugs
KSM Part Number Description
D01-A4M8UT 4 Way BT Line Plug 431A
D01-A6M8UT 6 Way BT Line Plug 631A