• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista CAB-Q-S-2M-Arista | 40G QSFP+ to 4x 10G SFP+ Breakout DAC Cable, 2m

CAB-Q-S-2M-Arista

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Description

The Arista CAB-Q-S-2M is a passive direct attach copper breakout cable designed for cost-effective 40G to 10G interconnections in data centres and telecom equipment rooms. This 2-metre twinax cable connects one 40G QSFP+ port to four 10G SFP+ ports, eliminating the need for additional power while delivering reliable, high-speed data transmission. Ideal for short-reach connections between switches, routers, and servers in high-density networking environments.

Features

Passive copper twinax construction for reliable, low-latency connectivity
- Hot-pluggable QSFP+ and SFP+ connectors for easy installation and maintenance
- Breakout design enables flexible 40G-to-10G connectivity
- Four independent 10 Gbps channels with error-free transmission
- No external power required, reducing energy consumption
- 30AWG copper cable for durability in data centre environments
- Compliant with industry-standard MSA specifications
- Cost-effective alternative to optical transceivers for short-reach applications
- Suitable for top-of-rack and end-of-row switch connections
- RoHS certified for environmental compliance

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

Form Factor: 40G QSFP+ to 4x 10G SFP+ breakout cable
- Cable Type: Passive Direct Attach Copper (DAC) twinax
- Cable Length: 2 metres (7 feet)
- Wire Gauge: 30AWG
- Data Rate: 40 Gbps aggregate (4x 10 Gbps)
- Technology: Passive copper, no power required
- Compliance: SFF-8436, SFF-8431, QSFP+ MSA, SFP+ MSA
- Operating Temperature: 0°C to 70°C (commercial)
- Applications: 40G Ethernet, InfiniBand QDR
- RoHS Compliant: Yes

FAQs

Q: What devices is the CAB-Q-S-2M compatible with?
A: This cable is designed for use with Arista switches and routers featuring 40G QSFP+ and 10G SFP+ ports. It enables a single 40G port to break out into four independent 10G connections for flexible network architecture design.

Q: What is the maximum transmission distance for this cable?
A: This is a 2-metre passive copper direct attach cable designed for short-reach connections within racks or adjacent equipment. For longer distances, active optical cables or fibre transceivers should be used.

Q: Does this cable require external power?
A: No, the CAB-Q-S-2M is a passive direct attach cable that draws power from the host ports and requires no external power supply, making it energy-efficient and simple to deploy.

Q: Can I use this cable to connect switches from different vendors?
A: This cable is coded specifically for Arista equipment. Cross-vendor compatibility depends on whether the receiving equipment accepts Arista-coded cables. Some compatible third-party cables support dual coding for mixed-vendor environments.

Q: What is the typical use case for this breakout cable?
A: The CAB-Q-S-2M is ideal for connecting a 40G switch port to four separate 10G devices such as servers or access switches, providing a cost-effective way to maximise port utilisation in data centre and enterprise networks.

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