Ubiquiti UACC-CM-RJ45-MG SFP+ to RJ45 Copper Adapter
Overview
The UACC-CM-RJ45-MG is a passive SFP+ to RJ45 copper adapter purpose-built for Ubiquiti UniFi infrastructure. It converts SFP+ fiber ports on UniFi switches and gateways to standard twisted-pair copper connectivity, supporting data rates of 1, 2.5, 5, and 10 Gbps. This adapter eliminates the need for dedicated fiber cabling runs in deployments where copper is already in place or preferred — a practical consideration in retrofits or multi-building campuses where fiber termination equipment may not exist at every endpoint.
Key Features
- Multi-rate copper connectivity (1/2.5/5/10 Gbps): Auto-negotiates speed with connected equipment, so the adapter works in mixed-speed environments without manual configuration. Deploy it on an aging 1G network and it downshifts; connect it to 10G infrastructure and it delivers full bandwidth.
- 100-meter copper run distance at 10 Gbps: Requires Cat 6A cabling to achieve this span. Cat 5e will work but limits you to shorter distances or lower speeds. This matters in warehouse and campus deployments where runs exceed 50 meters.
- Passive design (no active electronics): The adapter draws negligible power (1.9W) and has no firmware, which means zero complexity during installation and no future updates to manage. Insert it, plug in copper, and it works.
- Operating temperature 0–70°C (32–158°F): Suitable for standard indoor enclosures and unheated outdoor cabinets in temperate climates. Not rated for extreme cold or heat; verify environmental specs if deployed in data centers with aggressive cooling or direct-sun outdoor boxes.
- SFP+ form factor: Fits any UniFi switch or gateway with available SFP+ slots. Occupies one port per adapter, so account for port consumption if you're running margin-thin on uplinks.
- RJ45 termination: Standard Cat 5e/6/6A copper connectors. Any existing structured cabling plant can connect directly; no special connectors or patch cords required.
Integration and Compatibility
This adapter integrates with the UniFi switching and gateway line—specifically any device with SFP+ ports. Installation is insertion-based: plug the UACC-CM-RJ45-MG into an open SFP+ slot and connect standard RJ45 copper cabling. No software configuration, driver installation, or license activation required. It behaves as a transparent Layer 1 passthrough, so any ONVIF-compliant IP camera, access control reader, or network device can connect upstream without modification.
For network architects planning a transition from fiber to copper or consolidating uplinks, the UACC-CM-RJ45-MG is most useful as a bridging adapter on existing SFP+ infrastructure. If your roadmap calls for new fiber cabling, deploy fiber modules instead. If copper is already provisioned and you need to use SFP+ ports for density, this adapter is the right choice—it avoids the cost and lead time of fiber termination at the far end.
Frequently Asked Questions
Q: Will the UACC-CM-RJ45-MG work with non-Ubiquiti SFP+ ports?
A: The adapter is passive and SFP+-compliant, so it should work with any standards-compliant SFP+ module slot. However, testing and support are limited to UniFi devices. If you need to use it on a third-party switch, contact the switch vendor to confirm compatibility.
Q: What cable category do I need to reach 100 meters at 10 Gbps?
A: Cat 6A is required for 100-meter runs at 10 Gbps. Cat 6 will work for shorter distances; Cat 5e is not recommended for 10 Gbps over any significant distance.
Q: Can I use this adapter to replace fiber modules in an existing deployment?
A: Yes, you can swap the fiber module out and insert the UACC-CM-RJ45-MG, then connect copper cabling. Speeds will auto-negotiate based on the far-end device. If the far end is 1G-only, the link negotiates to 1 Gbps.
Q: Does the adapter require power?
A: No. The UACC-CM-RJ45-MG is passive and draws negligible power from the SFP+ slot. It does not require external power or PoE injection.
Q: Is there a warranty on the UACC-CM-RJ45-MG?
A: Ubiquiti typically provides a 1-year hardware warranty on accessories. Verify the specific terms with your distributor or check the included documentation.
Q: What happens if I use Cat 5e cabling with this adapter?
A: Cat 5e will work, but maximum distance at 10 Gbps will be shorter than the rated 100 meters, and performance may degrade. For reliable 10G links over longer distances, Cat 6A is strongly recommended.
Ted PerryPerspective based on aggregated and affiliated engineering team experience.
The UACC-CM-RJ45-MG is a straightforward passive adapter—no firmware, no power budget surprises, no compatibility guessing. If you have UniFi switches with empty SFP+ slots and cat6A already in the wall, this is your fastest path to 10G uplinks without fiber termination labor. Deploying this on a mixed-speed network (some endpoints 1G, others 5/10G) requires no special handling; the auto-negotiation handles it.
Technical Highlights:
- Passive copper conversion (10/5/2.5/1 Gbps): No active electronics means installation takes literal seconds, and the adapter needs zero support cycles once deployed. Auto-speed-matching eliminates the risk of manual configuration errors on uplink protocols.
- 100-meter reach at 10 Gbps (Cat 6A): This spec matters if your switch is in a building core and endpoints span a large warehouse or multi-floor campus. Fiber would achieve the same span but demands termination labor and equipment at both ends; copper is faster to deploy here.
- 1.9W power draw: Negligible compared to active switches or cameras. Even in power-constrained remote installations, the SFP+ slot's native power supply handles this without saturation.
Deployment Considerations:
- Cabling quality directly impacts distance at 10G. If your copper runs exceed 80 meters, verify Cat 6A compliance before deployment. Cat 6 or 5e will work but at reduced range or speed.
- This is a bridging adapter, not a replacement for fiber on longer campus runs or outdoor spans. If uplink future-proofing is a priority and your budget allows, fiber modules are a cleaner long-term choice.
Position the UACC-CM-RJ45-MG for retrofit scenarios where SFP+ infrastructure exists but fiber termination is cost-prohibitive, or for multi-building warehouses where structured copper cabling is already installed. For greenfield deployments on fiber-forward networks, skip the adapter and install fiber modules directly.
