Arista

Arista CAB-D-4Q-400-2.5 | 400G DAC breakout | QSFP-DD→4×100G QSFP | 400GBASE-CR8/100GBASE-CR2 | passive twinax | 2.5m

SKU:CAB-D-4Q-400-2.5

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Description

High-density 400G passive DAC breakout that fans a single QSFP-DD 400G port into four 100G QSFP ports, delivering low-latency copper connectivity for short-reach leaf–spine or server aggregation builds where breakout is supported.

Features

- Consolidates a single 400G port into four 100G links
- Ultra‑low power and latency for short-reach in-rack runs
- Durable twinax construction minimizes EMI and crosstalk
- Simple installation with secure latching connectors
- Ideal for dense spine/leaf breakouts and server 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 this cable passive or active?
A: Passive twinax DAC.

Q: Are separate transceiver modules required?
A: No, the QSFP-DD and QSFP connectors are integrated.

Q: What length is this cable?
A: 2.5 meters.

Q: What do I need for compatibility?
A: Devices must have QSFP-DD/QSFP ports with breakout support for 400G→4×100G and accept DAC cabling.

Q: Does it handle FEC?
A: FEC is provided by the host ports per 400GBASE-CR8/100GBASE-CR2 standards.

Technical Specifications

- Cable type: Direct Attach Copper (Twinax), passive
- Aggregate speed: 400 Gb/s
- Breakout: 1× QSFP-DD (400G) to 4× QSFP (100G each)
- Standards: 400GBASE-CR8 at QSFP-DD end; 100GBASE-CR2 at QSFP ends
- Lane mapping: 8 lanes total → 4×(2 lanes)
- Reach: 2.5 meters
- Connectors: QSFP-DD (host) to 4× QSFP (remote)
- Power: Passive (host powered signaling only)
- Use case: High-density top-of-rack breakouts and leaf–spine fan-outs

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