• 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-100G-3M-Arista | 100G QSFP28 Passive DAC Cable, 3m Twinax Copper

CAB-Q-Q-100G-3M-Arista

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Description

The Arista CAB-Q-Q-100G-3M is a 100GBASE-CR4 passive direct attach copper cable designed for high-speed 100 Gigabit connectivity over short distances. This 3-meter twinax copper cable features QSFP28 connectors on both ends, providing a cost-effective alternative to optical transceivers for rack-to-rack and intra-rack connections in data centre environments. Compliant with MSA standards and hot-pluggable for easy deployment.

Features

100GBASE-CR4 passive copper technology for cost-effective 100G connectivity
- Low power consumption design (0.5W maximum) reduces operational costs
- Hot-pluggable QSFP28 connectors for easy installation and maintenance
- Compliant with QSFP28 MSA and IEEE 802.3ba standards
- 28 AWG or 26 AWG twinax copper construction for flexibility and durability
- Supports data rates from 96.97 to 112.2 Gbps including 100G Ethernet and OTU4
- Low insertion loss and ultra-low crosstalk for reliable signal integrity
- Commercial temperature range operation (0°C to 70°C)
- Plug-and-play functionality with no additional drivers required
- CE and RoHS certified for environmental compliance
- Ideal for high-density data centre rack-to-rack interconnects
- Pre-programmed EEPROM for seamless integration with Arista platforms

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: 100GBASE-CR4 Passive Direct Attach Copper (DAC)
- Form Factor: QSFP28 to QSFP28
- Cable Length: 3 meters (9.8 feet)
- Data Rate: 100 Gbps
- Cable Gauge: 28 AWG or 26 AWG twinax copper
- Maximum Power Consumption: 0.5W
- Operating Temperature: 0°C to 70°C (commercial)
- Storage Temperature: -40°C to 85°C
- Compliance: IEEE 802.3ba, QSFP28 MSA, SFF-8665, SFF-8662
- Connector Type: Hot-pluggable QSFP28 on both ends
- Application Support: 100G Ethernet (103.125 Gbps), data rates 96.97-112.2 Gbps
- Certification: CE, RoHS compliant

FAQs

Q: What is the maximum distance supported by this cable?
A: The CAB-Q-Q-100G-3M supports connections up to 3 meters (9.8 feet). Passive direct attach copper cables are designed for short-reach connections within racks or across adjacent racks in data centres.

Q: Is this cable compatible with non-Arista switches?
A: While this cable is programmed and coded for Arista switches, compatible alternatives are available that can be configured to work with mixed-vendor environments. Check with your supplier for multi-vendor compatibility options.

Q: What are the advantages of using DAC cables over optical transceivers?
A: DAC cables offer lower power consumption (typically 0.5W vs 1.5-3.5W for optics), lower cost, and eliminate the need for separate transceivers and fibre patch cables. They are ideal for short-distance, high-density data centre interconnects.

Q: Does this cable support breakout configurations?
A: No, the CAB-Q-Q-100G-3M is a QSFP28 to QSFP28 cable for 100G to 100G connections. For breakout applications (100G to 4x25G), Arista offers separate SKUs such as the CAB-Q-4S-100G series.

Q: Is the cable hot-swappable?
A: Yes, this cable features hot-pluggable QSFP28 connectors on both ends, allowing you to install or replace the cable without powering down the connected switches, improving uptime and serviceability.

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