Cisco

Cisco NXA-QDD-CU05M | QSFP-DD 400G passive DAC, 0.5 m reach, 400GBASE-CR8, copper twinax (no optics), QSFP-DD to QSFP-DD connectors

SKU:NXA-QDD-CU05M

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Description

Ultra-short passive copper DAC for 400G QSFP-DD port-to-port connectivity, perfect for in-chassis or same-rack links where the lowest latency and simplest cabling are essential. Zero power consumption and hot-pluggable design streamline operations and airflow.

Features

- Shortest 0.5 m length for ultra-clean cable routing
- Zero power and minimal latency versus optical links
- Standards-based 400GBASE-CR8 interoperability
- Rugged twinax copper for reliable short-reach performance
- Plug-and-play, hot-pluggable design
- Ideal for in-rack leaf/spine interconnects
- Lower TCO compared to optical alternatives

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?
A: No, it is a passive copper DAC requiring no external power.

Q: What distances is 0.5 m suitable for?
A: Ideal for within the same rack or adjacent devices with minimal slack.

Q: Does it support 200G operation?
A: Operation depends on host port capabilities; the cable is designed for QSFP-DD ports and can support lower rates if the ports support them.

Q: Is it hot-pluggable?
A: Yes, on supported hardware.

Q: Do I need special transceivers?
A: No, this is a direct attach copper cable; no separate optics are needed.

Technical Specifications

- Cable type: Passive copper twinax DAC
- Form factor: QSFP-DD to QSFP-DD
- Data rate: up to 400 Gbps
- Ethernet standard: 400GBASE-CR8
- Reach: 0.5 meter
- Connectors: QSFP-DD male to QSFP-DD male
- Power: Passive (0 W), ultra-low latency
- Use case: Short intra-rack 400G interconnects
- Hot-swappable: Yes

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