• Silver-colored Arista 25G SFP28 twinax DAC cable modules with blue handles and metallic connectors in 3m length
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Arista

Arista CAB-S-S-25G-3M | 25G SFP28 Twinax DAC Cable, 3m, 25GBASE-CR Passive

Arista CAB-S-S-25G-3M | 25G SFP28 Twinax DAC Cable, 3m, 25GBASE-CR Passive

CAB-S-S-25G-3M

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Description

The Arista CAB-S-S-25G-3M is a 25GBASE-CR passive direct attach copper (DAC) cable with SFP28 connectors on both ends, delivering up to 25 Gbps over a 3-metre reach. Designed for intra-rack and adjacent-rack connectivity in data centre environments, this passive twinax cable consumes minimal power (max 0.57W per end) and requires no active electronics — making it a cost-effective, low-latency solution for switch-to-switch and switch-to-server interconnects. Dual-rate support at 10G or 25G provides deployment flexibility across mixed-speed infrastructures including NAS, SAN, and HPC environments.

Compliant with IEEE P802.3by and SFP28 MSA standards (SFF-8402, SFF-8432, SFF-8431), the CAB-S-S-25G-3M integrates seamlessly with Arista EOS and CloudVision, eliminating third-party qualification cycles and ensuring full vendor support. EEPROM-encoded connectors allow host systems to read cable identity and diagnostics automatically. Available as part of the CAB-S-S-25G-xM family in 1m, 2m, 3m, and 5m variants. Upgrade your network with gear from iptrading.com.au — Australia's IT hardware specialists.

Features

- Passive twinax copper design — no active electronics, ultra-low power consumption (max 0.57W per end)
- SFP28 to SFP28 connectors for direct switch-to-switch or switch-to-server connectivity
- Dual-rate support: operates at 25G or 10G for flexible, mixed-speed deployments
- Suitable for intra-rack and adjacent-rack connectivity in data centre environments
- EEPROM-encoded connectors provide cable identity and diagnostic information readable by the host system
- Plug-and-play integration with Arista EOS and CloudVision — no third-party qualification required
- IEEE P802.3by and SFP28 MSA compliant (SFF-8402, SFF-8432, SFF-8431)
- RoHS compliant for environmentally responsible deployments
- Ideal for NAS, SAN, and HPC interconnects requiring low-latency, high-bandwidth short-reach links
- Part of the CAB-S-S-25G-xM family — available in 1m, 2m, 3m, and 5m lengths

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

- Data Rate: 25 Gbps (25GBASE-CR); also supports 10G dual-rate operation
- Cable Type: Passive Twinax Copper Direct Attach Cable (DAC)
- Connector Type: SFP28 to SFP28
- Cable Length: 3 metres (~10 ft)
- Cable Technology: 25GBASE-CU
- AWG: 28 AWG
- Supply Voltage: +3.3V
- Operating Temperature: 0°C to 70°C
- Power Consumption: Max 0.57W per end
- Standards Compliance: IEEE P802.3by, SFP28 MSA (SFF-8402, SFF-8432, SFF-8431)
- RoHS Compliant: Yes

FAQs

Q: What is the Arista CAB-S-S-25G-3M used for?
A: It is a passive 25G direct attach copper (DAC) cable used for short-reach, high-bandwidth interconnects between switches, servers, and storage within a data centre rack or between adjacent racks. Common use cases include NAS, SAN, and HPC environments.

Q: Does this cable support speeds other than 25G?
A: Yes. The CAB-S-S-25G-3M supports dual-rate operation at both 25G and 10G, making it suitable for mixed-speed deployments where some hosts or switches operate at 10 Gbps.

Q: Is the CAB-S-S-25G-3M compatible with non-Arista switches?
A: While the cable is designed and validated for use with Arista hardware and integrates natively with Arista EOS and CloudVision, the SFP28 MSA-compliant connectors may operate with other vendors' equipment. However, Arista support and compatibility guarantees apply only to qualified Arista platforms.

Q: Why choose a passive DAC cable over an active cable or optical transceiver?
A: Passive DAC cables have no active electronics, resulting in lower cost, lower power consumption, and lower latency compared to active optical or active copper alternatives. They are ideal for intra-rack and adjacent-rack connections up to 5 metres where optical transceivers would be unnecessarily expensive.

Q: Are other lengths available in this cable family?
A: Yes. The CAB-S-S-25G-xM family includes 1m, 2m, 3m, and 5m variants, allowing you to choose the right reach for your rack layout without excess cable management overhead.

Q: Can I purchase the Arista CAB-S-S-25G-3M in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware specialist and stocks Arista cables and transceivers. Contact the team for pricing, availability, and volume order enquiries with local support.

Datasheet

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