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Grey QSFP+ direct-attach copper cable with metal connector housings, 5 metre length

LR-LINK

LR-LINK QSFP+ Network Ethernet Cable 40GBase QSFP+-DAC-5M

SKU CH-3S6Q-WF2RF

Passive direct-attach copper cable delivers 40 Gb/s links up to 5 metres with under 0.1 W draw and full IEEE 802.3ba compliance

  • 40 Gb/s bi-directional throughput for high-speed data centres
  • Passive copper design draws under 0.1 W for ultra-low power use
  • IEEE 802.3ba and InfiniBand QDR compliant for broad interoperability
  • All-metal housing delivers superior EMI shielding and reliability
  • Operates 0–70 °C and stores –40–85 °C for wide temperature tolerance

40G QSFP+ passive copper link

The LR-LINK QSFP+-DAC-5M is a shielded twinax cable built for 40 Gb/s bi-directional links between switches or servers in the same rack. It draws less than .1 W and meets IEEE 802.3 ba plus InfiniBand QDR specs for reliable short-haul traffic.

Replacing active optical modules on short runs

When the link stays inside one cabinet or connects adjacent cabinets, this passive assembly removes the cost and power draw of transceivers and patch cords. The jump is worth it whenever the distance fits the fixed five-metre reach and the ports support AC-coupled QSFP+ inputs.

Plug-and-play into any compliant QSFP+ cage

The all-metal housing slides straight into the port with no drivers or configuration required. The only common issue is a loose latch tab that can unseat the cable if the rack vibrates; verify the click and route the stiff cable so it cannot pull sideways on the connector.

Highlights

  • 40 Gb/s bi-directional throughput for high-speed data centres
  • Passive copper design draws under 0.1 W for ultra-low power use
  • IEEE 802.3ba and InfiniBand QDR compliant for broad interoperability
  • All-metal housing delivers superior EMI shielding and reliability
  • Operates 0–70 °C and stores –40–85 °C for wide temperature tolerance

Specifications

No published specifications for this item yet.

Questions about this item

What QSFP+ port spacing does the 5 m passive DAC need to fit between adjacent cabinets?

The cable uses standard QSFP+ connectors on both ends, so it fits any MSA-compliant port spacing in switches or NICs.

How is the LR-LINK QSFP+-DAC-5M installed, and which step is often missed?

Insert each end firmly until the latch clicks; the step people miss is verifying the 3.3 V supply is present on the host side before powering on.

When should this 40 Gb/s twinax cable be replaced in a 0–70 °C operating environment?

Replace it if link errors rise or the all-metal housing shows corrosion, as the passive copper has no active components to degrade otherwise.

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