• 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-0.5-Arista | 100G QSFP28 Passive DAC Cable, 0.5m (2ft)

CAB-Q-Q-100G-0.5-Arista

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Description

The Arista CAB-Q-Q-100G-0.5-Arista is a 100GBase-CU passive direct attach copper cable with QSFP28 connectors on both ends, offering a cost-effective solution for short-distance 100 Gigabit connectivity within racks and across adjacent racks. This 0.5-meter twinax cable delivers low power consumption and low latency, making it ideal for data center top-of-rack interconnects. Compliant with QSFP28 MSA, IEEE 802.3bj, and SFF-8665 standards, it provides reliable plug-and-play connectivity for Arista switches and routers.

Features

QSFP28 form factor with integrated copper twinax cable for simple plug-and-play installation
- Passive copper design eliminates need for external power or signal processing
- Low insertion loss and ultra-low crosstalk for reliable high-speed transmission
- Hot-pluggable capability for easy maintenance and improved uptime
- Compliant with QSFP28 MSA and IEEE 802.3bj 100GBASE-CR4 standards
- Cost-effective alternative to optical transceivers for short-reach applications
- Low power consumption (0.5W maximum per connector)
- Supports InfiniBand HDR applications
- Commercial temperature range operation (0°C to 70°C)
- RoHS compliant and environmentally friendly

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-CU Passive Direct Attach Copper (DAC)
- Connector Type: QSFP28 to QSFP28
- Cable Length: 0.5 meters (1.64 feet)
- Data Rate: 100 Gbps
- Wire Gauge: 30 AWG
- Cable Impedance: 100 Ohm
- Maximum Power Consumption: 0.5W per end
- Bit Error Rate: 10^-12
- Operating Temperature: 0°C to 70°C (commercial)
- Storage Temperature: -40°C to 85°C
- Standards Compliance: IEEE 802.3bj, QSFP28 MSA, SFF-8665, InfiniBand HDR
- Hot-Pluggable: Yes

FAQs

Q: What is the maximum distance supported by this DAC cable?
A: This passive direct attach copper cable supports connections up to 0.5 meters (approximately 1.64 feet), making it ideal for short-reach interconnects within a rack or between adjacent racks in data center environments.

Q: Is this cable compatible with non-Arista switches?
A: While this cable is designed for Arista Networks equipment and programmed with Arista compatibility codes, many third-party compatible versions support multi-vendor environments. Check with your vendor for cross-compatibility options or recoding services if connecting to other brands.

Q: What is the advantage of passive DAC over active DAC?
A: Passive DAC cables have no active signal amplification, resulting in lower power consumption (typically 0.5W vs 1-2W for active), lower cost, and lower latency. They are ideal for short-distance connections up to 5 meters.

Q: Can this cable be used for 40G connections?
A: No, this is a 100G QSFP28 cable designed specifically for 100 Gigabit Ethernet applications. For 40G connectivity, you would need a QSFP+ 40G DAC cable with the appropriate part number.

Q: What applications is this cable best suited for?
A: This cable is ideal for data center top-of-rack switching, server-to-switch connectivity, switch-to-switch interconnects within the same rack or adjacent racks, and any short-reach 100G application where cost efficiency and low power consumption are priorities.

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