100G QSFP28-DAC 3 Meter – Passive Direct Attach Copper Cable
Model Name : QSFP28-DAC
Brand : Cisco
Key Features
- QSFP28 to QSFP28 Connectivity – Direct 100 Gbps link between QSFP28 ports with no transceivers required.
- Passive Twinax Copper Cable – Low latency and low power consumption.
- 3 Meter Length – Perfect for short-range connections like ToR to ToR, server to switch, and rack interconnects.
- 100GBASE-CR4 Compliant – Meets standard 100 GbE electrical specs for direct attach cables.
- Wide Brand Compatibility – Works with Cisco, Dell, Juniper, Arista, Ubiquiti, MikroTik, Mellanox/NVIDIA and many others when QSFP28 ports support DAC.
- Plug-and-Play – No power supply or optics modules needed; install directly into QSFP28 ports.
30 Days Warranty
Condition : Refurbished
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- Description
- Specification
- Reviews
100G QSFP28-DAC 3 Meter cable is a passive direct attach copper (DAC) Twinax cable with QSFP28 connectors at both ends.
It provides a cost-effective, low-power solution for establishing short-range 100 GbE links between QSFP28 interfaces on switches, routers, NICs, and servers. Ideal for rack-to-rack and ToR connections in data centers and enterprise networks.
Frequently Asked Questions For 100G QSFP28-DAC 3 Meter cable
Q: What is a QSFP28-DAC cable?
A: A QSFP28-DAC (Direct Attach Copper) cable is a pre-terminated Twinax cable with QSFP28 connectors at each end that provides a direct 100 G connection between networking devices without requiring separate optics or transceivers.
Q: What devices can use a 100G QSFP28 DAC?
A: Switches, routers, servers, and NICs with QSFP28 100 GbE ports that support passive DAC cables from brands like Cisco, Dell, Juniper, Arista, MikroTik, and Ubiquiti.
Q: Is this suitable for long distances?
A: No — DACs are designed for short distances such as within racks or across adjacent racks (typically up to ~5 m).
Q: Do I need a transceiver with QSFP28-DAC?
A: No — the cable includes the QSFP28 connectors and does not require external transceivers or separate optics.
Q: What’s the main benefit of DAC vs AOC?
A: Lower cost and power consumption for short runs; however, Active Optical Cables (AOC) are better for longer distances (≥ 10 m) and more flexible routing.
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