• Arista Compatible 25G SFP28 to SFP28 Copper DAC Cable with Black Fiber and Silver SFP+ Module
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Blue Cable Co

CAB-S-S-25G-xM-BCC | Arista Compatible SFP28 To SFP28 Copper Direct-Attach 25GBASE-CR1 Cable | 1 to 5M

CAB-S-S-25G-1M-BCC

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Description

The CAB-S-S-25G-xM-BCC is a drop-in compatible replacement for the Arista CAB-S-S-25G-1M. This passive copper twinax cable provides plug-and-play connectivity between SFP28 ports on Arista switches and other equipment supporting 25GBASE-CR1. - Meets IEEE 802.3by 25GBASE-CR1 and SFP28 MSA SFF-8432 standards, ensuring interoperability with any vendor platform supporting these specifications - SFP28 form factor delivering 25 Gb/s data rate over passive copper twinax for short-range links up to 5 meters - Dual-rate capable: supports both 25G and 10G operation on compatible host ports - Available in six lengths: 1M, 1.5M, 2M, 2.5M, 3M, and 5M to suit intra-rack and adjacent-rack connectivity - FEC requirements vary by length: 1M to 2M operate without FEC, 2.5M and 3M require BASE-R FEC, 4M and 5M require RS-FEC on host ports - Hot-swappable design with 3.3V power supply and low insertion loss for reliable 25 Gigabit Ethernet links

Features

• IEEE 802.3by compliance guarantees compatibility with any 25GBASE-CR1 host port, eliminating vendor lock-in and enabling multi-vendor deployments across data center fabrics
• Passive twinax architecture requires no external power or active components, resulting in lower heat dissipation and simplified thermal management compared to active cables
• Dual-rate operation at 25G and 10G allows gradual network migration without forklift upgrades, reusing the same cable infrastructure as port speeds evolve
• Length-dependent FEC requirements: shorter cables (1M to 2M) achieve lower latency without FEC, while longer reaches (2.5M to 5M) require BASE-R or RS-FEC to maintain signal integrity
• SFP28 MSA SFF-8432 compliance ensures mechanical fit and electrical performance across switch vendors, routers, NICs, and storage arrays with SFP28 cages
• Low insertion loss and crosstalk characteristics support clean 25 Gb/s signaling over copper within racks and across adjacent racks, avoiding fiber optic complexity for short links
• Hot-swappable connectors with pull tabs enable live insertion and removal in active networks without power cycling, critical for maintaining uptime during patching or troubleshooting

Warranty

5-Year Advanced Warranty on All Blue Cable Co® Products

Blue Cable Co® offers a comprehensive 5-Year Advanced Warranty on all our branded products. Our advanced warranty ensures fast, hassle-free replacements to keep your network running smoothly. If a fault occurs, we’ll deliver a replacement part before you return the faulty item—minimising downtime and giving you complete peace of mind.

Choose Blue Cable Co® for reliable, high-quality network components backed by industry-leading warranty support.

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

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Technical Specifications

FAQs

Compatible SFP Selector

Technical Specifications

Brand: Blue Cable Co
BCC SKU: CAB-S-S-25G-xM-BCC
Compatible Replacement For: CAB-S-S-25G-1M
Compatibility: Arista compatible
Lab Testing: Tested in Sydney, Australia
Warranty: 5-year advanced hardware replacement (Blue Cable Co)
Form Factor: SFP28 to SFP28
Data Rate: 25 Gb/s (dual-rate 25G/10G)
Cable Type: Passive copper twinax
Standards: IEEE 802.3by 25GBASE-CR1, SFP28 MSA SFF-8432, SFF-8402
Available Lengths: 1M, 1.5M, 2M, 2.5M, 3M, 5M
Connector Type: SFP28
Power Supply: 3.3V
Operating Temperature: Commercial (0 to 70 degrees C typical)

FAQs

Q: Will this work in place of the Arista CAB-S-S-25G-1M?
A: Yes. This cable matches the Arista CAB-S-S-25G-1M electrical and mechanical specifications, conforming to IEEE 802.3by 25GBASE-CR1 and SFP28 MSA standards. It is plug-and-play compatible with Arista switches and any equipment with SFP28 ports supporting 25GBASE-CR1. The cable operates at 25 Gb/s data rate over passive copper twinax.

Q: Which Arista platforms support this cable?
A: This cable works in any Arista switch with SFP28 ports that comply with IEEE 802.3by and SFP28 MSA standards. This includes modular spine and leaf platforms with 25G connectivity. Consult Arista's transceiver and cable compatibility guide for your specific model, or verify that your platform supports 25GBASE-CR1 passive DAC cables.

Q: Do different cable lengths require different FEC settings on my switch ports?
A: Yes. The 1M, 1.5M, and 2M lengths do not require FEC and can operate at lower latency. The 2.5M and 3M lengths require BASE-R FEC (also called FC-FEC) enabled on both host ports. The 5M length requires RS-FEC on both ends. Refer to IEEE 802.3by cable classifications CA-N, CA-S, and CA-L, which define loss budgets and corresponding FEC minimums. Your switch configuration must match the cable length FEC requirement for reliable link operation.

Q: Can I use this cable at 10G instead of 25G?
A: Yes. Arista 25G twinax copper cables support dual-rate operation at both 25G and 10G speeds. Configure your switch port for 10G, and the cable will establish a 10GBASE-CR link. This allows you to reuse the same cable inventory during network migrations from 10G to 25G infrastructure without replacing physical cabling.

Q: What is the power consumption per connector, and how does passive copper compare to fiber or AOC?
A: Passive copper DAC cables consume minimal power, typically under 0.6W per end, as they rely solely on the host transceiver to drive the electrical signal without active components. This is significantly lower than fiber optic transceivers or Active Optical Cables, which require lasers and receivers. For short intra-rack or adjacent-rack links, passive copper offers the lowest cost, power, and latency profile, making it the preferred choice for data center top-of-rack and storage fabric applications.

Compatible SFP Selector

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100% compatible with equipment from major vendors

Coded and tested in our state of the art lab in Sydney

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Tested on real vendor hardware in Sydney

Every Blue Cable Co transceiver is coded for your platform and tested in our Sydney test rack on real vendor switches and firewalls before it ships. We check it is recognised and links up the same way the OEM optic does, so you don't find an "unsupported transceiver" error after it's installed.

Brands tested: Cisco, Meraki, Arista, Aruba, HPE, Juniper, Dell, Fortinet, Palo Alto, Check Point, Sophos, Moxa and NVIDIA. Speeds up to 100Gb.

  • 5 year replacement warranty
  • Sydney stock
  • Re-coding if you need it

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