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Blue 3 metre passive copper cable with QSFP28 connectors on both ends

Wiitek

Wiitek 100GbE QSFP28 DAC Twinax Cable 3 m

SKU CH-XPX6-SABH8

A 3 m passive copper twinax cable that establishes a 100 GbE link between QSFP28 ports on compatible switches and routers

  • Length3 m
  • 100 GbE throughput for high-density switch links
  • Passive copper design draws minimal power and emits low EMI
  • 3 m reach connects adjacent racks without signal loss
  • Broad vendor compatibility covers Cisco, Ubiquiti, Mikrotik and open-source platforms
  • IEEE 802.3 and SFF-8665 compliant with 0–70 °C operating range

What this cable is and who needs it

The Wiitek 100GbE QSFP28 DAC is a 3 m passive twinax copper cable with QSFP28 connectors on both ends. It provides a direct 100 Gbps Ethernet link between compatible switch ports inside a rack or between adjacent racks. Network engineers deploying 100 GbE uplinks or server-to-switch connections will use it to avoid the cost and power draw of optical transceivers.

How it fits into a build

The cable plugs directly into QSFP28 ports that support the 100GBASE-CR standard, so no separate transceivers or fibre patch cords are required. It draws power only from the port’s 3.3 V supply and is compliant with IEEE 802.3, SFF-8665 and the QSFP28 MSA, ensuring interoperability with Cisco QSFP-100G-CU3M, Ubiquiti, Mikrotik, Netgear, Supermicro and other open-source switches. Builders who need longer reach or fibre media will need a different solution.

Thermals, noise and power

As a passive copper assembly the cable adds no active components, so it generates no audible noise and contributes negligible heat to the rack. Power consumption stays at the minimum defined by the 3.3 V port supply, and the 30 AWG conductors are optimised for signal integrity with low EMI. Operating temperature range is 0 to 70 °C, and the RoHS-compliant construction meets standard environmental requirements.

Highlights

  • 100 GbE throughput for high-density switch links
  • Passive copper design draws minimal power and emits low EMI
  • 3 m reach connects adjacent racks without signal loss
  • Broad vendor compatibility covers Cisco, Ubiquiti, Mikrotik and open-source platforms
  • IEEE 802.3 and SFF-8665 compliant with 0–70 °C operating range

Specifications

Length3 m

Questions about this item

What is the maximum link speed this 3 m passive copper cable can sustain?

The cable is built for 100 GbE QSFP28 links and complies with IEEE 802.3 100GBASE-CR, so it sustains 100 Gbit/s over the full 3 m length.

How much power does the cable draw and how hot does it get during continuous operation?

As a passive twinax assembly it consumes no power of its own and adds negligible heat; the only thermal load comes from the host ports, and the cable is rated for 0–70 °C ambient.

Which switch ports are required at each end for this cable to work?

Both ends need a QSFP28 port that supports 100GBASE-CR direct-attach copper; the cable is MSA-compliant and tested with Cisco, Ubiquiti, MikroTik, Netgear, Supermicro and other open-source switches.

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