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Arista

Arista CAB-Q-Q-100G-1.5-Arista | 100G QSFP28 Passive Twinax DAC Cable, 1.5m

CAB-Q-Q-100G-1.5-Arista

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Description

The Arista CAB-Q-Q-100G-1.5-Arista is a 100GBASE-CR4 passive direct attach copper (DAC) twinax cable with QSFP28 connectors on both ends, designed for short-reach 100 Gigabit Ethernet connectivity. This 1.5-meter cable provides a cost-effective, low-power solution for connecting switches, routers, and servers within racks or adjacent racks in data centre environments. Ideal for high-density deployments requiring reliable 100G connectivity without the need for optical transceivers.

Features

100GBASE-CR4 passive copper technology for cost-effective 100G connectivity
- QSFP28 connectors on both ends for seamless integration with Arista switches and routers
- Passive design with no signal amplification, minimising power consumption and heat generation
- 30 AWG twinax copper construction for flexibility and high-density rack installations
- IEEE 802.3ba compliant for guaranteed interoperability with 100G Ethernet infrastructure
- Hot-pluggable for ease of installation and maintenance without network downtime
- Commercial temperature range suitable for standard data centre environments
- Low-latency direct attach solution ideal for high-frequency trading and real-time applications
- SFF-8636 management interface for proper identification and monitoring by network devices
- Durable and reliable construction for long service life in demanding data centre conditions

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: Passive Direct Attach Copper (DAC) Twinax Cable
- Connector Type: QSFP28 to QSFP28
- Cable Length: 1.5 meters (4.92 feet)
- Data Rate: 100 Gbps (100GBASE-CR4)
- Technology: 4 x 25G NRZ lanes
- Wire Gauge: 30 AWG
- Power Consumption: Maximum 0.5W per end (typical for passive cables)
- Temperature Range: Commercial (0°C to 70°C)
- Compliance: IEEE 802.3ba, SFF-8636
- Form Factor: Passive copper assembly (no signal amplification)
- Minimum Bend Radius: 33.5mm

FAQs

Q: What is the maximum transmission distance for this cable?
A: This passive DAC cable is designed for 1.5-meter short-reach connections, typically used within the same rack or between adjacent racks in data centres. Passive copper cables are not suitable for longer distances; for greater reach, consider active optical cables or fibre transceivers.

Q: Is this cable compatible with all Arista 100G QSFP28 ports?
A: Yes, this cable is designed for use with Arista 100G QSFP28 ports and is compatible with Arista switches and routers that support 100GBASE-CR4 passive copper cables. Always verify compatibility with your specific platform using Arista's Transceiver and Cable Guide.

Q: Does this cable require any power or licensing?
A: No, this is a passive copper cable that draws minimal power (typically 0.5W per end) directly from the switch port and requires no separate power supply or software licensing.

Q: Can this cable be used for breakout configurations?
A: No, this cable provides native 100G QSFP28 to QSFP28 connectivity. For breakout applications (e.g., 100G to 4x25G), you would need a specific breakout cable such as the CAB-Q-4S-100G series.

Q: What are the advantages of passive DAC cables over active optical cables?
A: Passive DAC cables offer lower cost, reduced power consumption, and simplified deployment for short-reach connections. They are ideal for intra-rack and adjacent-rack connectivity where distances do not exceed 5 meters, providing a reliable and economical alternative to optical transceivers.

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