• Vibrant pink glossy Juniper fruit sticker for QDD-400G-DAC-2P5M 400G DAC
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Juniper

Juniper QDD-400G-DAC-2P5M | 400G | QSFP-DD | 400GBASE-CR8 DAC | Passive Copper | 2.5 m | QSFP-DD to QSFP-DD | 28 AWG

QDD-400G-DAC-2P5M

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Description

High-performance 400G QSFP-DD direct attach copper cable for ultra-low latency, short-reach in-rack/inter-rack links. Passive 28 AWG construction delivers reliable 400GBASE-CR8 connectivity over 2.5 meters with standard 0–70°C operation and hot-pluggable ends for rapid deployment.

Features

- Ultra-low latency compared to optical links
- Power-efficient passive design
- Cost-effective short-reach 400G connectivity
- Simple plug-and-play deployment
- Secure latching QSFP-DD connectors

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

FAQs

Technical Specifications

- Data rate: 400 Gbps (8x 50G PAM4 lanes)
- Form factor: QSFP-DD to QSFP-DD
- Interface standard: IEEE 802.3 400GBASE-CR8
- Cable type: Passive copper DAC
- Wire gauge: 28 AWG
- Length: 2.5 meters
- Connector: QSFP-DD on both ends with pull-latch
- Power: Passive cable (host port power only), up to ~1.5 W budget
- Operating temperature: 0 to 70°C (standard)
- Hot-swappable: Yes
- Compliance: RoHS
- Compatibility: QSFP-DD 400G switch/router ports

FAQs

Q: Is this cable active or passive?
A: It is a passive DAC requiring no external power; only the host port provides the necessary electrical interface.

Q: Can this cable be used for 4x100G breakout?
A: No. This is a straight QSFP-DD to QSFP-DD 400G cable. For breakout, use a QSFP-DD to 4x QSFP56/QSFP28 breakout cable designed for that purpose.

Q: Is this compatible with OSFP ports?
A: No. It is designed for QSFP-DD ports only.

Q: What bend radius should I observe?
A: Follow typical copper DAC guidance (approximately 5–10x the cable outer diameter) to avoid signal degradation.

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