Ubiquiti UC-DAC-SFP28 SFP28 Direct Attach Copper Cable
Overview
The Ubiquiti UC-DAC-SFP28 is a Direct Attach Copper (DAC) patch cable engineered for high-speed, short-range connections between UniFi network infrastructure. Unlike traditional fiber optic transceivers, the UC-DAC-SFP28 (often searched as UC DAC SFP28) connects directly to SFP28 ports without additional transceivers or modules, reducing both equipment cost and deployment complexity in data center and enterprise switch environments.
Key Features
- Direct Attach Copper (DAC) Design: Eliminates the need for separate SFP28 transceivers, cutting per-connection costs and reducing parts inventory. Useful when you're connecting UniFi switches over distances under 10 meters and don't require the flexibility or range of fiber optics.
- SFP28 Connector Standard: Plugs directly into any SFP28 port on compatible UniFi switching hardware. The standardized connector ensures you won't face proprietary lock-in across your network infrastructure.
- High-Speed Interconnection: Supports the full bandwidth available in SFP28 slots on modern UniFi switches, enabling backbone and inter-switch connections without bottlenecking. Useful for aggregating traffic from multiple access switches into a core distribution layer.
- Plug-and-Play Installation: No transceiver configuration, firmware updates, or SFP module pairing required. Simply insert both ends into available SFP28 slots on supported UniFi devices and verify link status. Installation time is measured in seconds, not minutes.
- Cost-Effective Short-Range Solution: DAC cables cost significantly less per port than SFP28 transceivers plus fiber runs for equivalent distances under 10 meters. Reduces total cost of ownership in compact deployments.
- Reduced Power Consumption: No transceiver power draw, meaning your switch's power budget stays lighter compared to active transceiver solutions. Relevant if you're operating switches on managed power or in power-constrained facilities.
Integration & Compatibility
The UC-DAC-SFP28 integrates with UniFi network switches and infrastructure equipment equipped with SFP28 ports. Verify your specific UniFi switch model supports SFP28 connectivity before ordering. Installation requires only that both ends have available SFP28 slots; no additional configuration, driver installation, or VMS integration is necessary. The cable is vendor-neutral at the physical layer, though Ubiquiti recommends validating compatibility with your exact hardware revision before large deployments.
Frequently Asked Questions
Q: What is the maximum distance the UC-DAC-SFP28 can span?
A: Direct Attach Copper cables are designed for short-range connections, typically under 10 meters (33 feet). Beyond that distance, the signal integrity degrades. For longer distances, use SFP28 fiber transceivers instead.
Q: Do I need a transceiver or module to use the UC-DAC-SFP28?
A: No. The UC-DAC-SFP28 is a direct attach cable that plugs straight into SFP28 ports without requiring separate transceiver modules. This is the primary advantage over fiber solutions.
Q: Is the UC-DAC-SFP28 compatible with non-Ubiquiti switches?
A: The SFP28 connector is a standard, so the cable will physically insert into any SFP28 port. However, Ubiquiti recommends confirming compatibility with your specific hardware. Third-party switches may have different electrical or optical requirements.
Q: Can I use the UC-DAC-SFP28 in a surveillance or access control network?
A: Yes, if your surveillance or access control infrastructure uses UniFi switches with SFP28 ports. The cable simply provides a network backbone link and does not interact with camera, recorder, or access control software.
Q: What is the warranty on the UC-DAC-SFP28?
A: Refer to the manufacturer datasheet or contact Ubiquiti directly for specific warranty terms. Most Ubiquiti passive cables carry a limited hardware warranty.
Q: Should I choose a DAC cable or fiber transceiver for my switch-to-switch connection?
A: Use DAC if your switches are within 10 meters and you want lowest cost and zero configuration. Use fiber if you need longer distances, more isolation, or future flexibility. For distances over 30 meters, fiber is the only option.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The UC-DAC-SFP28 is the right choice when you're building a compact UniFi switching backbone and distance is not a constraint. I recommend it specifically for inter-switch connections under 10 meters where you want to avoid transceiver overhead entirely.
Technical Highlights:
- Direct Attach eliminates transceiver cost: A single UC-DAC-SFP28 costs a fraction of an SFP28 transceiver pair plus fiber cable, making it the most economical option for short runs.
- Zero configuration: Unlike transceivers, which sometimes require module pairing or firmware alignment, the UC-DAC-SFP28 is inserted and immediately live. No debugging SFP negotiation issues.
- Lower per-port power draw: Passive copper cables consume no power; active transceivers draw 1–3W each. Across a 48-port switch with multiple DAC uplinks, this difference is measurable on your power budget.
Deployment Considerations:
- DAC cable distance is hard-limited. Beyond 10 meters, signal attenuation becomes unpredictable. Measure your switch-to-switch distance before committing; if it exceeds 15 meters, switch to fiber immediately.
- Copper cables are susceptible to EMI in electrically noisy environments (e.g., industrial facilities, proximity to high-power equipment). If your equipment room has multiple UPS units, high-amperage PDUs, or VFD motors nearby, run a short test before full deployment.
Position the UC-DAC-SFP28 as your workhorse for backbone aggregation in compact data center and branch office switch stacking scenarios. It's also an excellent fit for warehouse automation networks where switch closets are co-located and you're prioritizing cost and simplicity over long-distance resilience.
