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Cisco

Cisco QDD-400-CU3M | Optics: 400G | QSFP-DD | 400GBASE-CR8 | wavelength: N/A | reach: 3 m | connector: QSFP-DD to QSFP-DD | cable: passive DAC

SKU:QDD-400-CU3M

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Description

3 m 400G QSFP-DD passive copper DAC engineered for short-reach, ultra-low-latency links in dense data center fabrics. Delivers dependable 400GBASE-CR8 performance between 400G switches, routers, and server NICs with minimal power draw.

Features

- 400G high-throughput connectivity
- Ultra-low latency passive copper
- Simple, reliable plug-and-play operation
- QSFP-DD high-density design
- Standards-compliant build quality

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: Will this work across different vendors?
A: It is vendor-coded; cross-vendor operation depends on device support. Check device compatibility.

Q: Is this suitable for inter-rack links?
A: Yes, for very short inter-rack runs up to 3 m. For longer distances, consider AOCs or transceivers with fiber.

Q: Can it be used for breakout applications?
A: No. Use a specific breakout DAC/AOC for 4x100G or 8x50G.

Q: What standards does it follow?
A: QSFP-DD MSA and IEEE 400G Ethernet (400GBASE-CR8) signaling.

Technical Specifications

- Data rate: 400 Gb/s (8 x 50G PAM4)
- Form factor: QSFP-DD to QSFP-DD
- Interface standard: 400GBASE-CR8
- Cable type: Passive copper DAC
- Length: 3 m
- Connectors: QSFP-DD male to QSFP-DD male
- Latency: Near-zero (passive copper)
- Operating temperature: 0 to 70 °C (commercial)
- Compliance: QSFP-DD MSA, RoHS
- Use case: In-rack and short inter-rack patching up to 3 m

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