• Silver-colored arista 25g sfp28 passive dac twinax cable modules with blue handles and metallic connectors 1.5m
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Arista

Arista CAB-S-S-25G-1.5 | 25G SFP28 Passive DAC Twinax Cable, 1.5m

CAB-S-S-25G-1.5

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Description

The Arista CAB-S-S-25G-1.5 is a 25GBase-CU passive direct attach copper twinax cable designed for high-speed 1.5-meter interconnections between SFP28 ports. Ideal for data centre top-of-rack and short-reach server-to-switch connections, this passive copper cable delivers reliable 25G Ethernet performance with low power consumption and cost-effective installation. It operates in standard commercial temperature ranges and supports dual-rate operation at 25G and 10G Ethernet speeds.

Features

25GBase-CU passive copper twinax technology for low latency and high reliability
- Dual-rate support: 25G Ethernet (25.78 Gbps) and 10G Ethernet (10.31 Gbps)
- Hot-pluggable SFP28 form factor for easy installation and replacement
- Low power consumption design (max 0.57W per end) for energy-efficient operation
- Commercial temperature range (0°C to 70°C) suitable for standard data centre environments
- MSA SFF-8402 compliant for multi-source interoperability
- IEEE 25GBASE-CR and 10GBASE-CR compliant for industry-standard compatibility
- RoHS, REACH, CE, and FCC certified for environmental and safety compliance
- Ideal for top-of-rack and short-reach data centre interconnects
- Cost-effective alternative to optical transceivers for distances up to 5 meters

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: Passive Direct Attach Copper (DAC) Twinax
- Data Rate: 25.78 Gbps (25G Ethernet) / 10.31 Gbps (10G Ethernet)
- Cable Length: 1.5 meters (4.9 ft)
- Connector Type: SFP28 to SFP28
- Wire Gauge: 26 AWG
- Operating Temperature: 0°C to 70°C (commercial)
- Power Consumption: Max 0.57W per connector end
- Supply Voltage: 3.3V
- Compliance: MSA SFF-8402, IEEE 25GBASE-CR, CE, FCC, RoHS, REACH

FAQs

Q: What is the maximum data rate supported by this cable?
A: The CAB-S-S-25G-1.5 supports data rates up to 25.78 Gbps for 25G Ethernet and is backward compatible with 10.31 Gbps for 10G Ethernet applications.

Q: Can this cable be used with switches from other vendors?
A: While this cable is programmed for Arista compatibility, passive DAC cables are typically vendor-neutral at the physical layer. However, proper EEPROM encoding is required for optimal compatibility and monitoring functions on Arista platforms.

Q: What is the typical use case for this 1.5m cable length?
A: This cable length is ideal for short-reach data centre applications such as top-of-rack switch-to-server connections, adjacently racked switch-to-switch links, and compact high-density networking environments where devices are in close proximity.

Q: Does this cable require any licensing or special configuration?
A: No, passive DAC cables do not require licensing. They are plug-and-play solutions that are automatically detected by the switch once installed in compatible SFP28 ports.

Q: What is the power consumption advantage of passive DAC over optical transceivers?
A: Passive DAC cables consume significantly less power than optical transceivers—approximately 0.57W per end compared to 1.5W for optical SFP28 modules—making them a cost-effective and energy-efficient choice for short-distance connections.

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