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

SKU:CAB-S-S-25G-1.5M-Arista

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Description

The Arista CAB-S-S-25G-1.5M is a 25GBase-CU passive direct attach copper (DAC) twinax cable designed for high-speed interconnection between SFP28 ports in data center and enterprise networking environments. This 1.5-meter cable delivers 25Gbps throughput over passive copper, offering a cost-effective and low-power alternative to optical transceivers for short-reach connectivity within a rack or between adjacent racks. Compliant with IEEE 802.3by 25GBASE-CR and SFP28 MSA standards, it supports both 25G and 10G Ethernet applications.

Features

25Gbps data throughput with passive copper twinax construction
- Dual-rate support: 25G Ethernet (25.78Gbps) and 10G Ethernet (10.31Gbps)
- Hot-pluggable SFP28 form factor for tool-free installation
- Ultra-low power consumption compared to optical solutions
- IEEE 802.3by 25GBASE-CR and SFP28 MSA compliant
- EEPROM with product information readable by host systems
- Suitable for intra-rack and adjacent rack connectivity
- RoHS compliant and environmentally friendly
- Commercial temperature range operation (0°C to 70°C)
- Cost-effective alternative to optical transceivers for short distances

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

Connector Type: SFP28 to SFP28
- Cable Type: Passive Direct Attach Copper (DAC) Twinax
- Data Rate: 25Gbps (25.78Gb/s), backward compatible with 10G
- Cable Length: 1.5m (4.9ft)
- Wire Gauge: 30AWG (typical)
- Operating Temperature: 0°C to 70°C (commercial)
- Supply Voltage: 3.3V
- Power Consumption: Max 0.57W per end (typical)
- Minimum Bend Radius: 25mm
- Standards Compliance: IEEE 802.3by 25GBASE-CR, SFP28 MSA (SFF-8402), RoHS
- Hot-pluggable design with EEPROM for host system identification

FAQs

Q: What network equipment is this cable compatible with?
A: This passive DAC cable is designed for use with any network switch, router, or server featuring SFP28 ports that support 25GBASE-CR. It is fully compatible with Arista switches and interoperable with other vendors' equipment supporting the SFP28 MSA standard.

Q: Can this cable support 10G Ethernet as well as 25G?
A: Yes, the CAB-S-S-25G-1.5M supports dual-rate operation at both 25Gbps (25G Ethernet) and 10Gbps (10G Ethernet), providing flexibility for mixed-speed deployments and backward compatibility with 10G SFP+ infrastructure.

Q: What are the advantages of using a DAC cable over optical transceivers?
A: Passive DAC cables offer several advantages for short-reach connections: significantly lower cost, reduced power consumption (no optics or lasers required), simplified installation with integrated connectors, and reliable performance for rack-to-rack or intra-rack connectivity up to 5 meters.

Q: What is the maximum distance for passive 25G DAC cables?
A: Passive 25G SFP28 DAC cables are typically available in lengths up to 5 meters. For distances beyond 5 meters, active optical cables (AOCs) or optical transceivers with fiber should be used instead.

Q: Does this cable require any special licensing or configuration?
A: No special licensing is required. The cable is hot-pluggable and includes EEPROM information that allows the host switch or router to automatically recognize and configure the connection. Simply insert both ends into compatible SFP28 ports.