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Arista

Arista CAB-S-S-25G-0.5M-Arista | 25G SFP28 Passive Twinax Cable, 0.5 Meter

CAB-S-S-25G-0.5M-Arista

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Description

The Arista CAB-S-S-25G-0.5M is a 25GBase-CU passive direct attach copper twinax cable with SFP28 connectors on both ends, designed for high-speed 0.5-meter connectivity within data center racks. This passive copper cable supports 25G Ethernet and is backward compatible with 10G applications. Compliant with IEEE 802.3by and SFP28 MSA standards, it offers a cost-effective, low-latency interconnect solution for short-reach connections between switches, servers, and storage devices.

Features

Dual-rate support for 25G and 10G Ethernet applications
- Passive copper twinax construction for low power consumption and minimal heat generation
- Integrated SFP28 transceivers with EEPROM for plug-and-play operation
- Hot-swappable and hot-pluggable for easy installation and maintenance
- IEEE 802.3by compliant CA-S cable classification
- SFP28 MSA SFF-8402 compliant form factor
- Low-latency direct copper connectivity for high-performance computing
- Cost-effective alternative to optical transceivers for short-reach applications
- RoHS compliant and CE certified for environmental and safety standards
- Suitable for top-of-rack and within-rack connectivity in data centers

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 Passive Direct Attach Copper (DAC) Twinax
- Connector Type: SFP28 to SFP28
- Cable Length: 0.5 meters (1.64 feet)
- Data Rate: Up to 25.78 Gbps
- Application Support: 25G Ethernet (25.78Gbps), 10G Ethernet (10.31Gbps)
- Standards Compliance: IEEE 802.3by, SFP28 MSA SFF-8402
- Power Consumption: Max 0.5W
- Operating Temperature Range: 0°C to 70°C (Commercial)
- Cable Type: CA-S (Standard loss category per IEEE 802.3by)
- Form Factor: Passive copper twinax with integrated transceivers

FAQs

Q: Is this cable compatible with 10G equipment?
A: Yes, the CAB-S-S-25G-0.5M supports both 25G and 10G Ethernet applications and can operate at 10G speeds when connected to 10G SFP+ ports, providing backward compatibility.

Q: What is the difference between passive and active direct attach cables?
A: Passive DAC cables like this one use no active components and consume minimal power (0.5W max), making them ideal for short distances up to 5 meters. They are more cost-effective and generate less heat than active cables or optical transceivers.

Q: Can I use this cable to connect Arista switches to other vendors' equipment?
A: Yes, this cable is designed to be interoperable with other vendors' equipment that supports 25G SFP28 or 10G SFP+ standards. The cable's EEPROM can be coded for compatibility with specific platforms.

Q: What is the maximum reach for this cable type?
A: This specific cable is 0.5 meters long. The CAB-S-S-25G series is available in various lengths including 1m, 2m, 3m, and 5m for different rack and inter-rack connectivity requirements.

Q: Does this cable require Forward Error Correction (FEC)?
A: The CAB-S-S-25G series is classified as CA-S type under IEEE 802.3by, which has specific FEC requirements. FEC configuration depends on the host platform and distance, but is typically supported for optimal performance at 25G speeds.

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