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Arista

Arista CAB-Q-Q-0.5M-Arista | 40G QSFP+ Passive DAC Cable, 0.5m Twinax

CAB-Q-Q-0.5M-Arista

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Description

The Arista CAB-Q-Q-0.5M is a 40G QSFP+ passive direct attach copper twinax cable designed for short-distance high-speed interconnects within data center racks. This 0.5-meter passive copper assembly provides a cost-effective alternative to fiber optic cabling for 40GbE switch-to-switch, switch-to-router, or switch-to-server connections. Compliant with QSFP+ MSA standards, it delivers reliable 40 Gb/s connectivity with low power consumption and seamless integration into Arista network infrastructure.

Features

Passive copper twinax construction for reliable 40 Gb/s connectivity
- QSFP+ MSA compliant form factor ensuring broad interoperability
- Low power consumption design with maximum 1.5W per connector
- Hot-pluggable for easy installation and maintenance without network downtime
- Cost-effective alternative to fiber optic solutions for short-reach applications
- Supports 40GBASE-CR4 Ethernet standard
- Operating temperature range of 0°C to 70°C for standard data center environments
- RoHS compliant and environmentally friendly
- Pre-programmed EEPROM for plug-and-play deployment in Arista networks
- Copper twinax cable minimizes signal loss and crosstalk
- 3.3V single power supply operation
- Ideal for high-density top-of-rack and aggregation layer deployments

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+
- Cable Type: Passive Copper Twinax
- Cable Length: 0.5 meter (1.64 ft)
- Data Rate: 40 Gb/s (4 x 10 Gb/s lanes)
- Maximum Line Speed: 41.25 Gbps
- Connector Type: QSFP+ at each end
- Power Consumption: Max 1.5W per end
- Supply Voltage: 3.3V
- Operating Temperature Range: 0°C to 70°C
- Compliance: QSFP+ MSA (SFF-8436), RoHS
- Applications: 40GBASE-CR4, 40G Ethernet

FAQs

Q: What is the maximum transmission distance for this cable?
A: The CAB-Q-Q-0.5M is designed for 0.5-meter (50cm) connections. Passive copper DAC cables are intended for short-distance intra-rack connectivity only. For longer distances, consider active optical cables or fiber transceivers.

Q: Is this cable compatible with non-Arista equipment?
A: While this cable is designed and programmed specifically for Arista switches and routers, passive DAC cables are typically interoperable across vendors when both devices support standard 40GBASE-CR4. However, compatibility testing with your specific equipment is recommended.

Q: What are the advantages of passive DAC over fiber optics for short connections?
A: Passive DAC cables offer significantly lower cost, reduced power consumption (no optical transceivers required), lower latency, and simpler installation compared to fiber solutions. They are ideal for high-density data center deployments where connections are within the same rack or adjacent racks.

Q: Does this cable support breakout configurations?
A: No, the CAB-Q-Q-0.5M is a standard 40G QSFP+ to QSFP+ cable providing a single 40 Gb/s link. It does not support 4x10G breakout functionality. For breakout applications, you would need specific breakout cables or modules.

Q: What maintenance or care does this cable require?
A: Passive copper DAC cables require minimal maintenance. Ensure connectors are clean and free from debris before insertion. Avoid excessive bending beyond the minimum bend radius. Store unused cables in a cool, dry environment. The cable supports hot-plug operation for easy installation and removal.

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