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LR-LINK 40G QSFP+ passive copper cable 3 m with QSFP+ connectors on both ends

LR-LINK

LR-LINK QSFP+-DAC-3M 40G QSFP+ passive copper cable 3 m

SKU CH-HT4N-ECBN2

Passive copper cable delivers 40 Gb/s total bandwidth over 3 metres with four 10 Gbps channels and under 1.5 W power draw

  • 40 Gb/s total bandwidth for high-density network links
  • Four 10 Gbps channels also run at 2.5 and 5 Gbps
  • Power draw below 1.5 W keeps rack thermals low
  • Operates from -40 °C to 85 °C for harsh environments
  • IEEE 802.3ba and InfiniBand QDR compliant for broad switch support

40G QSFP+ passive copper cable 3 m

The LR-LINK QSFP+-DAC-3M is a direct-attach passive copper cable built for 40 Gb/s total bandwidth across four independent duplex channels. It suits data-centre and enterprise racks where switches, routers or servers sit within three metres of each other and need a low-power, low-latency link without transceivers.

Plug-and-play installation with QSFP+ ports

Each end inserts into a standard QSFP+ cage and locks with the built-in latch; no drivers or firmware are required. The passive design draws under 1.5 W from the host +3.3 V supply, so heat is minimal. The only common issue is inserting the connector upside-down or not seating it until the latch clicks, which breaks the electrical contact.

Verify QSFP+ ports and 40G Ethernet support

Confirm both devices present QSFP+ cages and run 40G Ethernet compliant with IEEE 802.3ba or Infiniband QDR. The cable operates from -40 to 85 °C case temperature, so check that your rack airflow keeps the port area inside this range. Ensure the three-metre reach matches the physical spacing between the two ports.

How it compares

Measured against everything we stock in Ethernet & LAN Cables, at today’s prices. Recalculated every night.

Price $26.99
Pricier than about 72% of the 9,945 comparable items (median $14.99).

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Specifications

Product
Brand nameLR-LINK
Model nameQSFP+-DAC-3M

Questions about this item

How can I verify the cable is operating correctly after connecting it?

Check that both QSFP+ ports report a 40 Gb/s link with all four 10 Gbps channels active and power draw below 1.5 W.

What comes in the box and what extra parts are needed?

The package contains the 3 m passive copper cable with QSFP+ connectors on each end; no separate transceivers or power adapters are required.

Which cable version should I select for a 40 GbE link?

Choose the QSFP+-DAC-3M model, which provides four 10 Gbps lanes for 40 Gb/s total bandwidth and meets the IEEE 802.3ba standard.

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