Arista CAB-Q-4S-100G-2M-Arista | 100G to 4x25G Breakout DAC Cable, 2m, Passive Copper

SKU:CAB-Q-4S-100G-2M-Arista

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Description

The Arista CAB-Q-4S-100G-2M is a 2-meter passive direct attach copper breakout cable that connects one 100G QSFP28 port to four 25G SFP28 ports. This cost-effective twinax solution is ideal for short-reach connections within data center racks or telecom equipment rooms. Built to MSA standards and compliant with IEEE 802.3bj, SFF-8402, and SFF-8665, this passive copper cable delivers reliable 100G breakout connectivity without requiring additional power.

Features

Direct breakout from 100G QSFP28 to four 25G SFP28 ports for flexible connectivity
- Passive copper twinax technology eliminates need for external power
- Hot-pluggable design for easy installation and maintenance without downtime
- Cost-effective short-reach solution compared to optical transceivers
- Compliant with QSFP28 MSA and industry standards IEEE 802.3bj, SFF-8402, SFF-8665
- Low latency and high reliability for data center and high-performance computing applications
- Factory-programmed EEPROM for plug-and-play operation with Arista equipment
- 30AWG twinax construction for optimal signal integrity at 25Gbps per lane
- Suitable for top-of-rack switch to server, storage, and switch interconnects
- RoHS compliant and CE certified for environmental and safety standards

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) Breakout Cable
- Connector A: 1x QSFP28 (100G)
- Connector B: 4x SFP28 (25G each)
- Cable Length: 2 meters (6.6 feet)
- Technology: Passive Copper Twinax (30AWG)
- Data Rate: 100Gbps aggregate (4x 25Gbps lanes)
- Standards Compliance: IEEE 802.3bj, SFF-8402, SFF-8665, QSFP28 MSA
- Operating Temperature: Commercial (0°C to 70°C)
- Power Requirement: Passive (no external power required)
- Hot-Pluggable: Yes
- Certifications: CE, RoHS

FAQs

Q: What equipment is this breakout cable compatible with?
A: The CAB-Q-4S-100G-2M is designed for Arista switches and networking equipment with 100G QSFP28 ports. It allows you to break out one 100G port into four separate 25G SFP28 connections, ideal for connecting to servers, storage, or other switches with 25G interfaces.

Q: What is the maximum reach for this passive copper cable?
A: This is a 2-meter passive DAC cable optimized for very short distances within a rack or between adjacent racks. Passive copper cables are cost-effective but limited to short reach applications, typically up to 5 meters maximum depending on the model.

Q: Does this cable require external power or special configuration?
A: No, this is a passive copper cable that requires no external power source. It operates purely through the electrical signal from the host ports. The cable is hot-pluggable and typically recognized automatically by compatible Arista equipment without manual configuration.

Q: Can I mix this cable with other vendor equipment?
A: While this cable is programmed with Arista-specific EEPROM coding for guaranteed compatibility with Arista platforms, some third-party compatible versions may support cross-vendor operation. For mixed-vendor deployments, verify compatibility with your specific equipment or consider vendor-agnostic alternatives.

Q: What are the typical use cases for this breakout cable?
A: This breakout cable is commonly used in data center top-of-rack deployments where you need to connect multiple 25G servers or appliances to a single 100G uplink port on a switch. It provides a cost-effective way to maximize port density and reduce the number of high-speed ports required on core switches.