UGREEN 10Gbps Shielded RJ45 Inline Coupler (55359)
Overview
UGREEN 55359 is an inline RJ45 coupler for extending an Ethernet run with two existing male-ended network cables. Insert one cable at each end; no driver, power supply, configuration or network account is required.
What it does well.
Key features
At a glance
A physical extension point—not active network equipment.
Cable side A. Accepts one standard RJ45 male plug. Push until the latch clicks and do not force a damaged tab.
Cable side B. Accepts the second RJ45 male plug, creating one continuous point-to-point copper path.
Shielding. The metal body supports a shielded connection, but continuity depends on both cables and the connected ports.
Link responsibility. The coupler does not negotiate speed; the network devices at both ends establish the link through the complete channel.
Supports fast Ethernet links without promising impossible speed gains
10-gigabit component rating
UGREEN rates model 55359 up to 10Gbps when the cables, ports, total channel and installation also meet the required standard.
- Use matched, sound patch cables where possible.
- Confirm both network adapters support the intended speed.
Designed to continue a shielded cable path
Shielded metal body
A metal outer shell and nickel-plated contacts form the connection point. This is useful in a shielded cabling scheme, provided shielded RJ45 plugs and correctly grounded compatible equipment complete the path.
- Match shielding strategy across the link.
- Keep contacts clean and dry.
Connect two terminated patch leads in seconds
Tool-free extension
The female-to-female layout is plug and play: it is intended for cables that already have male RJ45 connectors. No punch-down tool or field wiring is required.
- Power down sensitive equipment if site policy requires it.
- Insert each plug straight and fully.
Small enough for organised indoor cable runs
Compact inline body
The listed body measures about 31 × 19 × 21mm. It can sit behind a desk, near a patch point or inside a dry cable-management space without a separate power brick.
- Use indoors in a dry location.
- Avoid tight enclosures that crush the latch tabs.
Use scenarios
Real-world applications
Appropriate ways to extend an RJ45 run.
Desk relocation. Join two patch cables when a PC, printer or dock moves beyond the reach of the existing lead.
Router or switch reach. Extend a patch connection to a router, switch or access point while keeping the total channel within the cable standard.
Temporary testing. Build a reversible lab or service connection without re-terminating cables.
Patch-cable reuse. Combine two known-good cables instead of replacing a run, provided an additional join is acceptable for the installation.
Compatible devices and systems
Device and system fit
Works with RJ45 Ethernet cables across common categories.
Cat7 and Cat6. Compatible with male RJ45 patch cables; high link speeds require the rest of the channel and equipment to match.
Cat5e and Cat5. Physically compatible, but the lower cable category may limit link speed and frequency performance.
Network equipment. Can sit between routers, switches, PCs, docks, printers, NAS and access points using copper RJ45 Ethernet.
Operating systems. The passive coupler is OS-independent because it contains no driver, controller or configuration interface.
Setup and usability guidance
Connection workflow
Create and verify the inline Ethernet join.
- Inspect both RJ45 plugs, latch tabs and coupler sockets.
- Route the two cables with slack and away from sharp bends or mains interference.
- Insert the first male RJ45 plug until its latch clicks.
- Insert the second plug from the opposite side until it clicks.
- Check the Ethernet link indicators at the connected equipment.
- Verify the negotiated speed in the operating system or managed switch where available.
The complete channel determines speed and reliability
Realistic performance
An inline coupler adds a connection point. Good cabling practice keeps joins clean, fully seated and within the total channel length allowed by the chosen Ethernet category.
10Gbps link. Requires compatible 10GbE ports, suitable cables and a compliant total run.
1Gbps link. Operates normally when the equipment negotiates Gigabit Ethernet; the coupler does not force 10Gbps.
Shielding. Works as part of a shielded path only when plugs, cables and equipment maintain that path.
Internet test. Broadband results reflect many other systems; first check the local Ethernet negotiated link rate.
Function scope and boundaries
Function scope and boundaries
- Join two male-ended RJ45 Ethernet patch cables.
- Provide a passive female-to-female copper path.
- Support a component rating up to 10Gbps.
- Fit Cat7, Cat6, Cat5e and Cat5 RJ45 cables.
- It does not split one Ethernet connection into two.
- It does not amplify, regenerate or boost a signal.
- It does not upgrade slow cables or ports to 10Gbps.
- It does not provide Wi-Fi, routing or switching.
Check before buying
Important limitations
Confirm these points before buying or connecting model 55359:
- Both existing cables need standard male RJ45 plugs.
- The slowest cable and port set the link ceiling.
- Total channel length still matters after joining cables.
- Shielding benefits require a compatible end-to-end shielded path.
- An extra connection point should remain dry and accessible.
Good practice
Good practice
- Use undamaged cables with working latch tabs.
- Insert plugs straight until they click.
- Leave strain-relief slack around the coupler.
- Verify negotiated link speed after installation.
- Do not use it as a splitter or switch.
- Do not force oversized or damaged plugs.
- Do not exceed cable-standard length guidance.
- Do not route loosely across walkways or near exposed mains wiring.
Warnings and limitations
Safe operation
Warning 1. Keep the coupler and contacts dry; moisture or conductive debris can cause corrosion or link faults.
Warning 2. Do not place the join where it can be stepped on, crushed by furniture or pulled by cable weight.
Warning 3. Separate network cabling from high-voltage wiring and follow applicable installation rules.
At a glance.
- Brand
- UGREEN
- Model / SKU
- 55359
- Product type
- Shielded inline RJ45 coupler
- Sockets
- RJ45 female × 2
- Listed data rating
- Up to 10Gbps
- Cable categories
- Cat7, Cat6, Cat5e, Cat5
- Body
- Metal shield
- Contacts
- Nickel-plated
- Power
- Passive; no external power
- Drivers
- None
- Dimensions
- 31 × 19 × 21mm
- Package quantity
- 1 coupler
- In the box
- UGREEN shielded RJ45 female-to-female coupler, model 55359 × 1
Verified technical details
In the box
Ethernet cables, network equipment and installation tools are not included.
Questions buyers ask.
What does this coupler do?
It joins two Ethernet cables that already have male RJ45 plugs, creating one longer passive cable path.
Does it support 10Gbps?
It is rated up to 10Gbps, but the cables, total channel and both network ports must also support that speed.
Will it make a Cat5 cable 10Gbps?
No. The lowest cable category and equipment capability remain the limit.
Is it an Ethernet splitter?
No. It creates one inline connection between two cables; it does not create two network outputs.
Does it need power or a driver?
No. It is a passive connector with no electronics, software or configuration.
What cable categories fit?
UGREEN lists Cat7, Cat6, Cat5e and Cat5 cables with standard male RJ45 plugs.
Does the shield guarantee no interference?
No. It can continue a shielded path only when the connected cables and equipment are also properly shielded and installed.
Can I use it outdoors?
No outdoor or waterproof rating is verified. Use it in a clean, dry indoor location.
Does it support PoE?
PoE pass-through is not specified for model 55359, so choose a separately verified PoE-rated coupler when power delivery is required.
Why did my link negotiate below 10Gbps?
Check both adapters, switches, cable categories, cable condition, total length and connector seating. The coupler cannot override the weakest component.
What is included?
One UGREEN 55359 shielded RJ45 female-to-female coupler. Cables are not included.