• 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-Q-3M-Arista | 40G QSFP+ Passive DAC Cable, 3m, Twinax Copper

CAB-Q-Q-3M-Arista

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Description

The Arista CAB-Q-Q-3M is a 40G QSFP+ passive direct attach copper (DAC) twinax cable designed for short-range, high-speed data center connectivity. This 3-meter cable provides a cost-effective alternative to fiber optic transceivers for rack-to-rack or intra-rack connections within 40GBASE Ethernet environments. Built to IEEE 802.3ba and QSFP MSA standards, it delivers reliable 40Gb/s throughput with low power consumption and minimal electromagnetic interference, making it ideal for enterprise data centers and cloud infrastructure deployments.

Features

40GBASE-CR4 passive copper twinax technology for high-speed data transmission
- QSFP+ MSA compliant connectors at both ends for universal compatibility
- Low power consumption design (maximum 1.5W per connector)
- Durable twinax copper construction with EMI shielding to minimize electromagnetic interference
- Plug-and-play installation with no additional drivers or software required
- Hot-pluggable for easy maintenance and installation without system downtime
- IEEE 802.3ba Ethernet and QDR InfiniBand compliant
- RoHS compliant and environmentally friendly design
- Cost-effective alternative to optical transceivers for short-range connectivity
- Reliable performance for data center, server, and storage networking applications

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: QSFP+ to QSFP+ passive direct attach copper cable
- Cable Length: 3 meters (9.8 ft)
- Data Rate: 40 Gb/s (4 x 10 Gb/s)
- Cable Type: Twinax copper, passive (40GBASE-CR4)
- Wire Gauge: AWG30
- Power Consumption: Maximum 1.5W per end
- Supply Voltage: 3.3V single power supply
- Compliance: IEEE 802.3ba Ethernet, QSFP MSA (SFF-8436), QDR InfiniBand, RoHS compliant

FAQs

Q: What is the maximum reach of the CAB-Q-Q-3M cable?
A: This passive copper cable is designed for 3-meter connections, ideal for short-distance connectivity within a rack or between adjacent racks in data centers.

Q: Is this cable compatible with all Arista 40G QSFP+ switches?
A: Yes, the CAB-Q-Q-3M is compatible with all Arista switches and routers that support 40GBASE QSFP+ transceivers and ports.

Q: Does this cable require external power or active components?
A: No, this is a passive copper cable that requires no additional power beyond the 3.3V supplied by the switch ports, making it highly energy-efficient with a maximum consumption of 1.5W per end.

Q: Can this cable be used for 10G connections?
A: While designed for 40G operation (4 x 10G lanes), this cable operates at the 40GBASE-CR4 standard. For breakout to four individual 10G connections, you would need a QSFP+ to 4x SFP+ breakout cable instead.

Q: What are the advantages of DAC cables over fiber optic transceivers?
A: Passive DAC cables offer significant cost savings over fiber optic solutions for short distances, require no transceivers, consume less power, and provide plug-and-play installation with lower latency and higher reliability for intra-rack connections.

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