LJ6C modules

Key Takeaway: LJ6C modules (often referred to as 6c modules) are a UK-standard size for data and voice outlets, measuring 21mm x 37mm.

• Primary Use: Specifically designed to fit into floor boxes, GOP boxes, and specialized UK-style faceplates where space is constrained.
• Standardization: Built to meet TIA/EIA performance standards for Category 5e and Category 6 cabling.
• Compatibility: Uses standard T568A or T568B wiring schemes for Ethernet applications.

What are the dimensions of an LJ6C module?

• The LJ6C standard defines a specific footprint for networking components.
• Unlike “Euro-size” modules (which are typically 25mm x 50mm), LJ6C modules are smaller at 21mm x 37mm.
• Because of their smaller width, multiple LJ6C modules can be mounted into a single gang faceplate or floor box plate to increase port density in tight spaces.

Applications and Installation Styles

• LJ6C data modules are available in several physical formats to suit different mounting environments.
  • Standard Modules: Typical depth for wall-mounted faceplates.
  • Low Profile: Reduced depth specifically engineered for shallow floor boxes.

Angled Modules: Designed to reduce cable stress by allowing the patch lead to exit at a downward angle, which also helps maintain the correct bend radius.

The choice of style is usually dictated by the depth of the backbox or the cable entry angle.

Cat5e vs. Cat6 LJ6C Modules

• While the physical exterior dimensions remain the same (21x37mm), the internal components are rated for different speeds.
• You must match the module category to your cable category to ensure the network meets its performance rating.
• The Application:
  • Cat5e LJ6C: Supports Fast Ethernet and Gigabit Ethernet up to 100MHz.
  • Cat6 LJ6C: Supports Gigabit Ethernet at higher frequencies (250MHz) and features improved crosstalk reduction.

Frequently Asked Questions (FAQ)

What is the difference between LJ6C and Euro modules? LJ6C modules measure 21mm x 37mm, while Euro modules measure 25mm x 50mm. LJ6C modules are the standard choice for floor boxes in the UK, whereas Euro modules are more common for wall-mounted faceplates.

Are LJ6C modules shuttered? Yes, most LJ6C RJ45 modules include a spring-loaded shutter. This protects the internal contact pins from dust and debris when a patch cable is not plugged in.

Can I use a Cat6 module with Cat5e cable? Yes, networking components are backwards compatible. However, the overall performance of the link will be limited to the lowest-rated component (in this case, Cat5e).

Get Expert Technical Advice

Still unsure which specification suits your project? The experts at Comms Express are available to provide bespoke recommendations for residential, commercial, or industrial deployments.

Next Step: Browse our full range of RJ45 Ethernet Cables or contact our team for a bulk-buy quote today.