Cisco

Cisco NXA-QDD-CU1M | QSFP-DD 400G passive DAC, 1 m reach, 400GBASE-CR8, copper twinax (no optics), QSFP-DD to QSFP-DD connectors

SKU:NXA-QDD-CU1M

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Description

Short-reach passive copper DAC for 400G QSFP-DD links between switches or switch-to-adapter connections. Provides plug-and-play operation, ultra-low latency, and zero power draw for efficient intra-rack cabling.

Features

- 1 m length balances flexibility and tidy routing
- Zero power consumption and near-zero added latency
- Standards-based 400GBASE-CR8 copper interface
- Robust, reliable twinax construction
- Hot-pluggable for easy moves, adds, and changes
- Cost-effective alternative to optical transceivers

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 or active?
A: Passive copper twinax; no active electronics and no external power.

Q: What applications is 1 m suitable for?
A: Intra-rack connections between switches, or switch-to-adapter/NIC links with short routing paths.

Q: Can it operate at lower speeds?
A: Yes, if the connected QSFP-DD ports support lower-speed modes via breakout/gearbox or speed negotiation.

Q: Is it hot-pluggable?
A: Yes, when used with compatible hardware.

Q: Do I need optics?
A: No. As a DAC, it plugs directly into QSFP-DD ports.

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: 1 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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