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Arista

Arista CAB-S-S-25G-5M-Arista | 25G SFP28 Passive DAC Twinax Cable, 5m

CAB-S-S-25G-5M-Arista

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Description

The Arista CAB-S-S-25G-5M is a 25GBase-CU passive direct attach copper (DAC) twinax cable designed for high-speed, short-distance data centre connectivity. Featuring SFP28 connectors at both ends and a 5-metre reach, this cost-effective cable solution is ideal for connecting 25G-capable switches within a rack or between adjacent racks. The passive copper design requires no external power, making it energy-efficient and reliable for demanding network environments.

Features

25GBase-CU passive twinax copper construction for reliable high-speed connectivity
- SFP28 MSA compliant connectors ensure broad platform compatibility
- Dual-rate support for both 10G and 25G operation
- Low power consumption with no external power required (passive design)
- Hot-pluggable for easy installation and maintenance
- EEPROM memory for host system identification and diagnostics
- Cost-effective alternative to optical transceivers for short-reach applications
- RoHS compliant for environmental responsibility
- Ideal for top-of-rack and leaf-spine data centre architectures
- Tested for compatibility with Arista SFP28 25G platforms

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: 25GBase-CU SFP28 to SFP28 Passive Direct Attach Copper (DAC)
- Data Rate: 25 Gbps
- Cable Length: 5 metres (16.4 feet)
- Connector Type: SFP28 (both ends)
- Cable Assembly: Passive twinax copper
- Wire Gauge: 24 AWG (typical) / 26 AWG
- Supply Voltage: 3.3V
- Power Consumption: Max 0.57W per end
- Operating Temperature: Commercial range (0°C to 70°C typical)
- Compliance: IEEE 802.3, SFP28 MSA SFF-8402, RoHS
- Compatibility: Arista SFP28 25G platforms, supports 10G/25G dual-rate operation
- Form Factor: Small Form-Factor Pluggable (SFP28)

FAQs

Q: Is this cable compatible with 10G SFP+ ports?
A: Yes, Arista 25G twinax copper cables including the CAB-S-S-25G-5M can support 10G operation, allowing dual-rate 10G/25G use when connected to compatible platforms.

Q: What is the maximum distance supported by this DAC cable?
A: This passive copper cable supports a maximum reach of 5 metres (16.4 feet), making it ideal for intra-rack or short inter-rack connections in data centres.

Q: Does this cable require external power?
A: No, this is a passive direct attach cable that operates without external power. It draws minimal power (max 0.57W per end) directly from the host switch ports.

Q: Can I use this cable with non-Arista equipment?
A: While designed for Arista platforms, this cable follows industry-standard SFP28 MSA specifications. Compatibility with other vendors depends on their support for third-party optics; consult your equipment documentation.

Q: What are the advantages of passive DAC over active optical cables?
A: Passive DAC cables are more cost-effective, consume less power, and require no additional electronics, making them the preferred choice for short-distance, high-density data centre deployments under 7 metres.

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