• Silver-colored arista cab-s-s-25g-0.5 sfp28 passive twinax dac cable modules with blue handles and metallic connectors
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Arista

Arista CAB-S-S-25G-0.5 | 25G SFP28 Passive Twinax DAC Cable, 0.5m

Arista CAB-S-S-25G-0.5 | 25G SFP28 Passive Twinax DAC Cable, 0.5m

CAB-S-S-25G-0.5

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Description

The Arista CAB-S-S-25G-0.5 is a 0.5-metre passive 25GBASE-CR SFP28 to SFP28 Direct Attach Copper (DAC) Twinax cable engineered for ultra-short-reach, high-density connectivity inside data centre racks. Delivering 25 Gbps with near-zero latency and under 1W total power draw, it is the ideal low-cost, low-power alternative to optical transceivers for top-of-rack switch-to-server and switch-to-storage interconnects. Backward-compatible 10/25G dual-rate operation adds deployment flexibility across mixed-speed Arista environments.

Compliant with IEEE 802.3by (25GBASE-CR) and the SFP28 MSA (SFF-8402), this passive copper cable integrates seamlessly with Arista 25G SFP28 platforms and is RoHS certified for environmentally responsible deployments. Its EEPROM encoding ensures automatic host recognition and plug-and-play simplicity. Well-suited to networking, NAS/SAN storage, and high-performance computing (HPC) applications requiring reliable, high-bandwidth rack-level links. Order now at iptrading.com.au — trusted by Australian IT professionals.

Features

- Passive copper design — no active components, ultra-low power and heat generation
- 10/25G dual-rate support for flexible operation on Arista 25G SFP28 ports
- SFP28 MSA (SFF-8402) compliant for broad platform interoperability
- IEEE 802.3by (25GBASE-CR) standards compliant
- EEPROM encoded for automatic host identification and plug-and-play deployment
- Optimised for rack-level and adjacent-rack connectivity in high-density data centres
- Suitable for Ethernet, NAS/SAN storage, and HPC interconnect applications
- RoHS compliant — meets environmental and regulatory requirements

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

- Cable Length: 0.5 metres (1.6 ft)
- Data Rate: 25 Gbps (25GBASE-CR)
- Connector Type: SFP28 to SFP28
- Cable Type: Passive Twinax Copper (DAC)
- Form Factor: SFP28 (Small Form-factor Pluggable)
- Supply Voltage: 3.3V
- Max Power Consumption: 0.5W per end (1W total)
- Wire Gauge: 24–26 AWG
- Standards: IEEE 802.3by (25GBASE-CR), SFP28 MSA SFF-8402
- Operating Temperature: 0°C to 70°C (Commercial)
- RoHS Compliant: Yes

FAQs

Q: What devices is the CAB-S-S-25G-0.5 compatible with?
A: This cable is designed for use with Arista switches and platforms featuring 25G SFP28 ports, such as the Arista 7050CX3, 7060CX2, and 7280CR series. It is SFP28 MSA compliant, making it broadly interoperable with other vendors' 25G SFP28-equipped switches and servers that accept MSA-standard DAC cables.

Q: Is this an active or passive cable, and what is the maximum supported distance?
A: The CAB-S-S-25G-0.5 is a passive Direct Attach Copper (DAC) Twinax cable. Passive DAC cables are ideal for very short distances — this variant supports 0.5 metres (50 cm), making it perfect for within-rack or adjacent-rack top-of-rack switch-to-server connections where fibre optics would be unnecessarily costly.

Q: Does this cable support 10G as well as 25G?
A: Yes. The cable supports dual-rate 10G and 25G operation on compatible Arista SFP28 ports, providing flexibility when connecting legacy 10G SFP+ infrastructure alongside newer 25G equipment.

Q: Can I purchase the Arista CAB-S-S-25G-0.5 in Australia?
A: Yes. iptrading.com.au stocks Arista DAC cables including the CAB-S-S-25G-0.5 and ships across Australia. Our team can assist with bulk orders and multi-SKU data centre cabling projects. Contact us or order directly online.

Q: Why choose a DAC cable over an SFP28 optical transceiver for short distances?
A: Passive DAC cables like the CAB-S-S-25G-0.5 offer significant cost savings over optical transceivers, consume minimal power (under 1W total), and introduce virtually zero latency. For rack-level distances under 3 metres, DAC cables are the preferred choice in data centre deployments.

Q: What certifications does this cable carry?
A: The Arista CAB-S-S-25G-0.5 is compliant with IEEE 802.3by (25GBASE-CR), the SFP28 MSA standard (SFF-8402), and is RoHS certified, meeting both technical interoperability requirements and environmental regulations applicable in Australia.

Datasheet

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