Arista

Arista CAB-D-D-400-2.5 | 400G DAC | QSFP-DD to QSFP-DD | 400GBASE-CR8 | Copper (no wavelength) | 2.5m | Twinax Direct Attach

Arista CAB-D-D-400-2.5 | 400G DAC | QSFP-DD to QSFP-DD | 400GBASE-CR8 | Copper (no wavelength) | 2.5m | Twinax Direct Attach

SKU:CAB-D-D-400-2.5

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Description

Straight-through QSFP‑DD to QSFP‑DD 400G direct-attach copper cable for ultra‑low‑latency, short‑reach links in leaf/spine and AI/compute fabrics. Compliant with IEEE 802.3 CR8 for reliable 400G PAM4 connectivity over copper within the rack.

Features

- 400G straight-through QSFP‑DD copper interconnect
- Ultra-low latency, zero-power design
- 2.5m reach for in-rack high-density deployments
- 8-lane CR8 compliance for robust 400G links
- Rugged twinax with EMI resistance and secure latching
- Plug-and-play with IEEE and MSA alignment

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

Technical Specifications

- Data rate: 400G (PAM4)
- Standard: 400GBASE-CR8
- Form factor: QSFP-DD (both ends)
- Cable type: Direct Attach Copper (Twinax), passive
- Length: 2.5 meters
- Lanes: 8 lanes
- Latency/power: near-zero latency, no power consumption
- Use cases: switch-to-switch or switch-to-accelerator in high-density racks
- Compliance: IEEE 802.3 CR8, QSFP-DD MSA

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