• Silver-colored arista cab-s-s-25g-2.5 25g sfp28 passive dac cable with blue handles and metallic connectors
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Arista

Arista CAB-S-S-25G-2.5 | 25G SFP28 Passive DAC Cable, 2.5m Twinax

CAB-S-S-25G-2.5

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Description

The Arista CAB-S-S-25G-2.5 is a 2.5-meter passive direct attach copper twinax cable designed for high-speed 25GbE connectivity between SFP28 ports in data center environments. This cost-effective passive DAC provides reliable short-distance connections within racks and across adjacent racks, supporting 25GBASE Ethernet while offering backward compatibility with 10G. Compliant with IEEE 802.3by and SFP28 MSA standards, it delivers low power consumption and seamless plug-and-play deployment for Arista networking equipment.

Features

Hot-pluggable SFP28 form factor for easy installation and maintenance
- Passive copper technology with no active components for high reliability
- Low insertion loss and low crosstalk for signal integrity
- Dual-rate support: 25G and 10G operation
- EEPROM with product identification for automatic host system recognition
- Cost-effective alternative to optical transceivers for short-reach applications
- EMI/EMC compliant design for minimal electromagnetic interference
- Lead-free and RoHS compliant for environmental compliance
- Designed for high-density data center environments
- Compatible with Arista 25GbE Ethernet switches and network adapters

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

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

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Technical Specifications

FAQs

Technical Specifications

Cable Type: 25G SFP28 Passive Direct Attach Copper (DAC) Twinax Cable
- Cable Length: 2.5 meters (8 feet)
- Data Rate: 25 Gbps (backward compatible with 10 Gbps)
- Connector Type: SFP28 to SFP28
- Cable Gauge: 30 AWG
- Power Consumption: Maximum 0.5W
- Compliance: IEEE 802.3by, SFP28 MSA (SFF-8402), SFF-8432, RoHS
- Operating Temperature: 0°C to 70°C (standard networking environments)
- Power Supply: Single 3.3V
- Minimum Bend Radius: 21.25mm

FAQs

Q: What is the maximum distance supported by this cable?
A: This passive direct attach copper cable supports connections up to 2.5 meters (8 feet), making it ideal for short-distance connectivity within a rack or between adjacent racks in data centers.

Q: Is this cable compatible with 10G SFP+ ports?
A: Yes, the CAB-S-S-25G-2.5 supports dual-rate operation and is backward compatible with 10G SFP+ ports, providing flexibility for mixed-speed network deployments.

Q: Does this cable require external power?
A: No, this is a passive copper cable that draws minimal power (maximum 0.5W) directly from the host switch ports. No external power supply is required.

Q: What Arista switch platforms support this cable?
A: This cable is compatible with Arista switches that have 25G SFP28 ports, including data center and campus switches from the 7000 and 7500 series families. Always verify compatibility with your specific switch model.

Q: What are the advantages of passive DAC cables over optical transceivers?
A: Passive DAC cables offer lower cost, lower power consumption, and reduced latency compared to optical transceivers for short-distance connections. They are ideal for rack-to-rack connectivity where fiber reach is not required.

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