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Arista

Arista CAB-Q-4S-100G-5M-Arista | 100G QSFP28 to 4x 25G SFP28 Breakout DAC Cable, 5m

CAB-Q-4S-100G-5M-Arista

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Description

The Arista CAB-Q-4S-100G-5M is a 5-meter passive direct attach copper breakout cable that connects one 100G QSFP28 port to four 25G SFP28 ports. Ideal for high-density data centre deployments requiring cost-effective short-reach 100G to 4x25G connectivity. MSA compliant and designed for seamless integration with Arista networking platforms.

Features

Passive copper twinax construction for low latency and zero power consumption
- Breakout architecture enables 4:1 port multiplication from 100G to 25G
- MSA-compliant QSFP28 and SFP28 connectors for broad interoperability
- Supports IEEE 802.3bj 100GBASE-CR4 and 25GBASE-CR standards
- Low insertion loss and consistent signal integrity across all four lanes
- Cost-effective alternative to optical breakout solutions for short-reach applications
- Hot-pluggable design for easy installation and maintenance
- Pre-coded EEPROM for automatic recognition by Arista network operating system
- Durable twinax cable jacket suitable for commercial temperature environments
- RoHS and CE certified for environmental and safety compliance

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) Breakout
- Connector: 1x QSFP28 to 4x SFP28
- Cable Length: 5 meters (16.4 feet)
- Data Rate: 100Gbps aggregate (4x 25Gbps)
- Cable Material: Passive Twinax Copper
- Wire Gauge: 28AWG or 30AWG typical
- Temperature Range: 0°C to 70°C (commercial)
- Compliance: MSA SFF-8665, SFF-8402, IEEE 802.3bj, 100GBASE-CR4
- Power Consumption: Passive, no external power required
- Certifications: CE, RoHS compliant

FAQs

Q: What is this cable used for?
A: The CAB-Q-4S-100G-5M breakout cable connects a 100G QSFP28 switch port to four separate 25G SFP28 ports, enabling efficient port density and migration from 25G to 100G infrastructure in data centre and campus environments.

Q: Is this cable compatible with non-Arista equipment?
A: While designed and coded for Arista platforms, this cable follows MSA industry standards and may work with other vendors' equipment that supports 100G QSFP28 to 4x25G SFP28 breakout configurations. Compatibility should be verified with your equipment vendor.

Q: What is the maximum supported cable length for this breakout type?
A: Arista offers passive copper breakout cables from 1 to 5 meters. The 5-meter length represents the maximum reach for passive copper at 100G speeds while maintaining signal integrity without active components.

Q: Does this cable require a software license on Arista switches?
A: No, DAC cables do not require any software licenses on Arista switches. The cable is plug-and-play once the switch ports are configured for the appropriate speed and breakout mode.

Q: Can I mix this cable with optical transceivers on the same switch?
A: Yes, you can use DAC breakout cables alongside optical transceivers on the same switch. Arista switches support mixed media types across different ports without restriction.

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