• Silver-colored Arista CAB-Q-Q-0.5 sfp+ transceiver modules with blue handles and metallic connectors for 40G QSFP+ DAC cable
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Arista

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

CAB-Q-Q-0.5

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Description

The Arista CAB-Q-Q-0.5 is a 0.5-meter 40GBASE-CR4 QSFP+ passive direct attach copper twinax cable designed for cost-effective, short-reach interconnects in data center environments. Featuring QSFP+ connectors on both ends, this cable provides reliable 40 Gbps connectivity between switches, routers, and servers within racks or across adjacent racks. With low power consumption and passive copper construction, it delivers an energy-efficient alternative to fiber optic solutions for high-speed connections.

Features

Passive copper twinax construction for cost-effective high-speed connectivity
- QSFP+ MSA compliant for industry-standard compatibility
- Low power consumption design with maximum 1.5W per connector
- Hot-pluggable interface for easy installation and maintenance
- Pre-programmed and tested for seamless integration with Arista equipment
- 40GBASE-CR4 support enabling 40 Gbps aggregate bandwidth
- RoHS compliant and lead-free construction
- Suitable for top-of-rack and intra-rack data center deployments
- No external power supply required
- Low latency passive copper design for optimal performance

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-CR4 Passive Direct Attach Copper (DAC) Twinax
- Form Factor: QSFP+ to QSFP+ connectors
- Data Rate: Up to 40 Gbps (4 x 10 Gbps)
- Cable Length: 0.5 meters (1.64 feet)
- Connector Type: QSFP+ (Quad Small Form-factor Pluggable Plus) both ends
- Power Consumption: Maximum 1.5W per end
- Supply Voltage: 3.3V
- Operating Temperature: 0°C to 70°C (commercial temperature range)
- Compliance: QSFP+ MSA (Multi-Source Agreement) SFF-8436, IEEE 802.3, RoHS compliant
- Cable Gauge: AWG30 passive copper twinax

FAQs

Q: What is the maximum transmission distance for this cable?
A: The CAB-Q-Q-0.5 is designed for very short-reach applications up to 0.5 meters (1.64 feet). It is ideal for connecting devices within the same rack or adjacent racks in a data center.

Q: Is this cable compatible with non-Arista equipment?
A: While this cable is specifically designed and programmed for Arista switches and routers, passive DAC cables generally follow industry-standard MSA specifications. However, compatibility with multi-vendor environments should be verified before deployment.

Q: What are the main advantages of using DAC cables over fiber optic transceivers?
A: DAC cables offer several benefits including lower cost, reduced power consumption (1.5W vs. typical transceiver pairs), simpler installation with integrated connectors, and lower latency. They are ideal for short-distance connections where fiber reach is not required.

Q: Can this cable support breakout configurations?
A: This is a standard 40G QSFP+ to QSFP+ cable designed for 40 Gbps links. For breakout configurations (such as 4x10G), you would need a different cable type specifically designed for breakout applications.

Q: What switches is this cable compatible with?
A: This cable is compatible with Arista switches that feature QSFP+ ports supporting 40G connectivity, including the 7000 series and other data center platforms. Consult Arista's transceiver and cable compatibility guide for your specific switch model.

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