Arista

Arista CAB-D-8S-400-2.5 | 400G DAC breakout | QSFP-DD→8×50G SFP | 400GBASE-CR8/50GBASE-CR | passive twinax | 2.5m

Arista CAB-D-8S-400-2.5 | 400G DAC breakout | QSFP-DD→8×50G SFP | 400GBASE-CR8/50GBASE-CR | passive twinax | 2.5m

SKU:CAB-D-8S-400-2.5

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Description

Ultra-dense 400G passive DAC breakout connecting one QSFP-DD 400G port to eight 50G SFP ports, delivering short-reach copper links for high-fan‑out topologies where breakout is supported.

Features

- Maximizes port utilization with 1:8 400G to 8×50G breakout
- Low-latency, energy-efficient in-rack copper connectivity
- Twinax shielding enhances signal integrity and EMI resistance
- Secure latching on QSFP-DD and SFP ends for reliable installation
- Ideal for dense server aggregation and leaf fan-outs

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: Is the cable passive?
A: Yes, it is a passive twinax DAC.

Q: Are additional optics required?
A: No, the QSFP-DD and SFP connectors are integrated.

Q: What length options are supported here?
A: This model is 2.5 meters.

Q: What do I need to ensure compatibility?
A: Host and endpoints must have QSFP-DD/SFP ports that support 400G→8×50G breakout with DAC cabling.

Q: How is error correction handled?
A: By the host ports per 400GBASE-CR8 and 50GBASE-CR specifications.

Technical Specifications

- Cable type: Direct Attach Copper (Twinax), passive
- Aggregate speed: 400 Gb/s
- Breakout: 1× QSFP-DD (400G) to 8× SFP (50G each)
- Standards: 400GBASE-CR8 at QSFP-DD end; 50GBASE-CR at SFP ends
- Lane mapping: 8 lanes total → 8×(1 lane)
- Reach: 2.5 meters
- Connectors: QSFP-DD (host) to 8× SFP (remote)
- Power: Passive (ultra‑low host power)
- Use case: High-fan‑out 400G to 8×50G server or TOR connections

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