Arista

Arista CAB-Q-4S-100G-5M | 100G QSFP28 to 4x25G SFP28 DAC, 100GBASE-CR4/25GBASE-CR, 5m twinax breakout

Arista CAB-Q-4S-100G-5M | 100G QSFP28 to 4x25G SFP28 DAC, 100GBASE-CR4/25GBASE-CR, 5m twinax breakout

SKU:CAB-Q-4S-100G-5M

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Description

High-density breakout DAC enabling one 100G QSFP28 port to fan out to four 25G SFP28 links using low-latency twinax copper. Designed for flexible rack-to-rack short-reach deployments where simplified cabling and low power are priorities.

Features

- Flexible 5m reach for in-row layouts
- Breaks out 100G to four independent 25G links
- Low power and simplified cabling
- Standards-based, MSA-compliant construction
- Robust twinax design for reliable 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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FAQs

Technical Specifications

FAQs

Q: Will this work if my device does not support breakout?
A: No. The host ports must support 100G to 4x25G breakout operation.

Q: Is the 5m length suitable for in-row connections?
A: Yes, 5m is commonly used for in-rack and in-row short-reach links.

Q: What connectors are on each end?
A: One QSFP28 end and four SFP28 ends, all integrated direct-attach.

Q: Does it add significant latency?
A: No. Passive twinax DACs provide extremely low latency.

Technical Specifications

- Interface: QSFP28 to 4x SFP28 (breakout)
- Aggregate speed: 100GbE (4x25GbE lanes)
- Standards: 100GBASE-CR4 and 25GBASE-CR (IEEE 802.3bj/by)
- Cable type: Twinax copper
- Length: 5 meters
- Passive, low-latency link
- MSA compliant; host must support breakout mode
- Typical operating temperature: 0°C to 70°C
- Use case: Short-reach TOR/leaf-spine connectivity
- Reduced EMI versus discrete copper assemblies

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