• Silver-colored arista sfp+ transceiver modules with blue handles and metallic connectors for 100g qsfp28 dac cable
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Arista

Arista CAB-Q-Q-100G-1M | 100G QSFP28 DAC Cable, Passive Twinax, 1M

Arista CAB-Q-Q-100G-1M | 100G QSFP28 DAC Cable, Passive Twinax, 1M

CAB-Q-Q-100G-1M

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Description

The Arista CAB-Q-Q-100G-1M is a passive 100GBASE-CR4 Direct Attach Copper (DAC) Twinax cable delivering 100 Gbps connectivity between QSFP28 ports in high-density data centre environments. Ideal for short-reach rack-to-rack and top-of-rack switch interconnects, this 1-metre cable eliminates the need for optical transceivers, offering ultra-low latency, minimal power consumption (max 1.5W per end), and significant cost savings over fibre-based alternatives. Built to IEEE 802.3bj, SFF-8665, and SFF-8679 standards, it delivers four full-duplex 25 Gbps channels across individually wrapped twinax copper pairs for low insertion loss and reduced crosstalk.

Fully compatible with Arista switches running EOS 4.15.2 or later, this MSA-compliant cable also supports InfiniBand EDR applications. Its passive design requires no active components, ensuring reliable plug-and-play deployment in tightly cabled environments. RoHS compliant and available in multiple lengths from 0.5m to 5m for flexible topology planning. Visit iptrading.com.au to secure your order — enterprise-grade hardware with expert support.

Features

- Passive design — no active components, delivering ultra-low latency and minimal power draw
- Four full-duplex 25 Gbps channels across eight differential copper pairs for reliable 100G throughput
- Individually wrapped twinax pairs minimise insertion loss and reduce crosstalk
- Cost-effective alternative to optical transceivers for short-reach data centre interconnects
- Compatible with Arista 100G QSFP28 switch ports running EOS 4.15.2 or later
- Supports 100G Ethernet (4x25 Gbps) and InfiniBand EDR applications
- MSA-compliant for broad multi-vendor interoperability
- Available in multiple lengths (0.5m–5m) for flexible data centre cabling topologies
- RoHS compliant; PVC/OFNR jacket rated for in-rack and inter-rack deployments

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Standard: 100GBASE-CR4 (IEEE 802.3bj)
- Connector Type: QSFP28 to QSFP28
- Cable Type: Passive Twinax Copper (PVC/OFNR jacket)
- Cable Length: 1 metre (3.28 ft)
- Data Transfer Rate: 100 Gbps (103.1 Gbit/s line speed)
- Channels: 4 x 25 Gbps (up to 28 Gbps per channel)
- Wire Gauge: 30 AWG
- Supply Voltage: 3.3V
- Power Consumption: Max 1.5W per end
- Operating Temperature: 0°C to +70°C
- EOS Minimum Version: 4.15.2
- Compliance: IEEE 802.3bj, SFF-8665, SFF-8679, RoHS, MSA

FAQs

Q: What devices is the Arista CAB-Q-Q-100G-1M compatible with?
A: This cable is compatible with Arista switches featuring 100G QSFP28 ports and running EOS version 4.15.2 or later. It is also MSA-compliant, meaning it can work with other vendors' QSFP28-equipped switches and networking equipment in multi-vendor environments. It additionally supports InfiniBand EDR applications.

Q: Why choose a DAC cable over an optical transceiver for 100G connections?
A: Passive DAC cables like the CAB-Q-Q-100G-1M offer several advantages for short-reach connections: they are significantly more cost-effective than optical transceivers, consume less power (max 1.5W per end), introduce ultra-low latency with no active components, and require no fibre infrastructure. They are the preferred choice for rack-to-rack and top-of-rack switch interconnects within or between adjacent racks.

Q: What is the maximum reach of the 1-metre Twinax cable, and are other lengths available?
A: The CAB-Q-Q-100G-1M is rated for a 1-metre reach, suitable for connections within the same rack or between immediately adjacent racks. Arista also offers this cable family in 0.5m, 1.5m, 2m, 2.5m, 3m, and 5m variants to suit different rack and aisle configurations.

Q: Is this cable compliant with international standards and RoHS regulations?
A: Yes. The CAB-Q-Q-100G-1M complies with IEEE 802.3bj, SFF-8665, SFF-8679, and is fully RoHS compliant. It is also MSA (Multi-Source Agreement) certified, ensuring interoperability across a broad range of networking equipment.

Q: Can I purchase the Arista CAB-Q-Q-100G-1M in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller supplying Arista networking products including DAC cables. Our team can assist with volume orders, compatibility advice, and fast local fulfilment with expert technical support.

Q: What warranty does the Arista CAB-Q-Q-100G-1M carry?
A: Arista provides a 1-Year Limited Hardware Warranty covering parts, repair, or replacement with a 10 business day turnaround. Optional upgrade support including Next Business Day and 4-hour Advance Hardware Replacement is also available for environments requiring tighter SLAs.

Datasheet

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