Arista

Arista CAB-Q-Q-3M | 40G | QSFP+↔QSFP+ | 40GBASE-CR4 | n/a | 3m | passive twinax DAC

Arista CAB-Q-Q-3M | 40G | QSFP+↔QSFP+ | 40GBASE-CR4 | n/a | 3m | passive twinax DAC

SKU:CAB-Q-Q-3M

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Description

Passive 40GbE QSFP+ to QSFP+ direct-attach copper (DAC) cable, 3 meters. Compliant with IEEE 802.3ba 40GBASE-CR4 and QSFP+ MSA (SFF-8436). Delivers ultra‑low latency and near‑zero power for short intra‑rack or adjacent‑rack links between switches, NICs, and storage. Rugged twinax construction with secure latching for reliable, tool‑less deployment.

Features

- 40GBASE-CR4 compliant for reliable 40GbE links
- Passive twinax design for ultra‑low latency and low cost
- Secure latching QSFP+ connectors for robust fit
- MSA compliance for broad interoperability
- Tool‑less, plug‑and‑play installation

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 active or passive?
A: It is a passive twinax DAC with near‑zero power draw.

Q: What is the typical use case?
A: Short intra‑rack or adjacent‑rack 40GbE links between switches and servers where minimal latency and cost are priorities.

Q: Will it work with any QSFP+ port?
A: It works with QSFP+ 40G ports that support passive DAC. Some devices may require vendor‑coded cables; check your platform’s compatibility list.

Q: Does it carry optical signals?
A: No, it is copper twinax (no optics, no wavelength).

Technical Specifications

- Interface speed: 40 Gbps (CR4)
- Cable type: Passive copper twinax, direct-attach (DAC)
- Form factor/connectors: QSFP+ male to QSFP+ male
- Length: 3 meters
- Standards: IEEE 802.3ba 40GBASE-CR4; QSFP+ MSA (SFF-8436)
- Power: Passive, near-zero power consumption
- Latency: Ultra-low, no optical conversion
- Use case: Short-reach ToR/leaf–spine, switch-to-server, switch-to-switch
- Compatibility: QSFP+ 40G ports that support passive DAC

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