• Silver-colored sfp+ transceiver modules with blue plastic handles and metallic connectors for arista 400g qsfp-dd dac cable
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Arista

Arista CAB-D-D-400G-3M | 400G QSFP-DD DAC Twinax Copper Cable, 3m, 8x50G

Arista CAB-D-D-400G-3M | 400G QSFP-DD DAC Twinax Copper Cable, 3m, 8x50G

CAB-D-D-400G-3M

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Description

The Arista CAB-D-D-400G-3M is a 400GBASE-CR8 passive Direct Attach Copper (DAC) cable delivering 400Gbps connectivity between two QSFP-DD ports over a 3-metre twinax copper link. Designed for high-density data centre interconnects, it uses 8 x 50Gb/s PAM-4 lanes to achieve full 400G bandwidth with no active components, keeping power consumption and cost well below optical alternatives. Ideal for top-of-rack and spine-leaf cabling within the same rack row or adjacent racks.

Fully plug-and-play with Arista EOS (4.23.0 and later) and CloudVision, the cable is hot-swappable and compliant with MSA open standards, ensuring broad interoperability across 400G QSFP-DD platforms. It is backed by Arista TAC support and a 1-year limited hardware warranty, with optional next-business-day advance replacement available. Order today at iptrading.com.au — your local source for enterprise-grade networking solutions.

Features

- Passive DAC design — no active components, ultra-low power consumption and heat output
- 8 x 50Gb/s PAM-4 electrical lanes deliver full 400G aggregate bandwidth
- QSFP-DD form factor for compatibility with high-density 400G switch ports
- Plug-and-play integration with Arista EOS (4.23.0+) and CloudVision
- Hot-swappable for maximum uptime and simplified servicing
- MSA-compliant for broad industry interoperability
- Cost-effective alternative to optical transceivers for short-reach data centre links
- Part of Arista's comprehensive 400G connectivity portfolio including DACs, AOCs, and QSFP-DD/OSFP transceivers
- Fully supported by Arista TAC for enterprise peace of mind

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

- Part Number: CAB-D-D-400G-3M
- Data Rate: 400Gbps (400GBASE-CR8)
- Form Factor: QSFP-DD to QSFP-DD
- Cable Type: Passive Twinax Copper (DAC)
- Cable Length: 3 metres
- Electrical Interface: 8 x 50Gb/s PAM-4 lanes
- Minimum EOS Version: EOS 4.23.0
- Warranty: 1-Year Limited Hardware Warranty

FAQs

Q: What is the maximum distance supported by the CAB-D-D-400G-3M?
A: This cable supports a reach of 3 metres, making it suitable for short-range interconnects within the same rack or between adjacent racks in data centre environments. Arista also offers 1m and 2m variants in the CAB-D-D-400G series for tighter cabling requirements.

Q: Is this a passive or active cable?
A: It is a passive Direct Attach Copper (DAC) cable with no active electronic components. This means lower power consumption and reduced cost compared to active optical cables (AOCs) or transceivers, while still delivering full 400G performance at short distances.

Q: Which Arista switches and platforms are compatible with the CAB-D-D-400G-3M?
A: The cable is compatible with any Arista platform featuring QSFP-DD ports and running EOS 4.23.0 or later. This includes Arista 400G data centre switches such as the 7050X4, 7060X4, and 7170 series. It is fully integrated with Arista EOS and CloudVision for seamless management.

Q: Can this cable be used with non-Arista switches?
A: The CAB-D-D-400G-3M conforms to MSA (Multi-Source Agreement) open standards for 400GBASE-CR8 QSFP-DD interfaces. While it is optimised and validated for Arista platforms, it may be compatible with third-party QSFP-DD equipment — check the vendor's compatibility list before deployment.

Q: Can I purchase the Arista CAB-D-D-400G-3M in Australia?
A: Yes. IP Trading stocks Arista DAC cables including the CAB-D-D-400G-3M and ships across Australia. As a B2B IT hardware specialist, IP Trading can assist with bulk orders, project pricing, and compatibility advice for your data centre deployment.

Q: What warranty and support is included?
A: The CAB-D-D-400G-3M includes a 1-year limited hardware warranty covering parts and repair or replacement. Optional next-business-day and 4-hour advance hardware replacement programmes are available through Arista. Full Arista TAC support is also provided for the lifetime of the product.

Datasheet

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