• 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-3M-Arista | 40G QSFP+ to 4x 10G SFP+ Breakout DAC Cable, 3m

CAB-Q-S-3M-Arista

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Description

The Arista CAB-Q-S-3M is a 3-meter passive direct attach copper breakout cable designed for high-speed 40G to 10G connectivity in data centers and enterprise networks. It provides a cost-effective alternative to fiber optic assemblies, connecting a single 40G QSFP+ port to four 10G SFP+ ports over passive twinax copper. Fully compliant with MSA standards and tested for seamless integration with Arista network equipment.

Features

Passive copper twinax construction requires no external power source for signal transmission
- Factory pre-programmed EEPROM for plug-and-play installation and automatic device recognition
- Hot-pluggable design allows installation and removal without powering down network equipment
- Low latency performance ideal for high-frequency trading, HPC clusters, and real-time applications
- Compliant with SFF-8436 and SFF-8431 industry standards for broad interoperability
- Cost-effective alternative to fiber optic breakout solutions for short-reach applications
- Suitable for top-of-rack switching, server aggregation, and storage area network deployments
- RoHS compliant and environmentally friendly design
- Robust twinax copper construction provides excellent EMI shielding and signal integrity
- Supports 40GBASE-CR4 to 4x 10GBASE-CU standards for full-rate connectivity

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: 40GBase-CU QSFP+ to 4x 10GBase-CU SFP+ Passive Direct Attach Copper Breakout Cable
- Cable Length: 3 meters (9.8 feet)
- Data Rate: 40 Gbps aggregate (4 x 10 Gbps)
- Connector Type: QSFP+ on one end, 4x SFP+ on the other
- Cable Gauge: 30AWG passive copper twinax
- Power Supply: 3.3V single supply
- Power Consumption: Maximum 1.5W per end
- Standards Compliance: MSA compliant, SFF-8436, SFF-8431, QSFP+ and SFP+ MSA standards
- Temperature Range: Commercial operating temperature (0°C to 70°C)
- Certifications: RoHS compliant, CE certified

FAQs

Q: What is the difference between this breakout cable and a standard QSFP+ cable?
A: The CAB-Q-S-3M is a breakout cable that splits one 40G QSFP+ connection into four separate 10G SFP+ connections, allowing you to connect a single 40G switch port to four devices with 10G SFP+ ports. Standard QSFP+ cables connect 40G to 40G directly.

Q: Is this cable compatible with other vendors' equipment?
A: While programmed for Arista Networks equipment, this cable follows MSA standards and can work with other vendors' switches and routers that support 40G QSFP+ and 10G SFP+ ports. Compatibility should be verified with your specific hardware.

Q: What are the advantages of using a passive DAC cable over fiber optics?
A: Passive DAC cables are significantly more cost-effective than fiber optic transceivers and cables for short-distance connections up to 3 meters. They require no additional power, have lower latency, and are ideal for rack-to-rack connectivity within data centers.

Q: Can this cable be used for storage network applications?
A: Yes, this cable is suitable for data center storage networks, high-performance computing clusters, and server-to-switch connectivity where 40G to 10G breakout connectivity is required within the 3-meter distance limitation.

Q: Does this cable require any licensing or configuration?
A: No licensing is required. The cable is factory pre-programmed with EEPROM configuration data and is plug-and-play. It will be automatically recognized by compatible Arista switches and routers upon installation.

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