• Vibrant pink glossy Juniper QDD-8X50G-2P5M 400G DAC sticker
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Juniper

Juniper QDD-8X50G-2P5M | 400G→8x50G DAC | QSFP56-DD↔8xSFP56 | 400GBASE-CR8/50GBASE-CR | passive twinax | 26AWG | reach 2.5m

QDD-8X50G-2P5M

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Description

400G to 8x50G breakout passive copper DAC for dense leaf/spine or server aggregation where slightly longer in-rack reach is required. Delivers zero-power, ultra-low latency performance with standards-based interoperability on hosts that support QSFP56-DD 8x50G breakout.

Features

- Extends passive breakout reach to 2.5 m with robust 26 AWG twinax
- Eight 50G fan-out links for efficient rack-scale designs
- Standards-compliant 400GBASE-CR8/50GBASE-CR and CMIS
- No power, minimal latency, and reduced cost vs. optics
- Tool-less latching for quick install and serviceability

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

- Form factor: QSFP56-DD to 8x SFP56 passive DAC (breakout)
- Aggregate data rate: 400GbE; breakout: 8x 50GbE PAM4
- Cable type: Twinax copper, passive
- Wire gauge: 26 AWG
- Length: 2.5 meters
- Electrical standards: IEEE 802.3ck (400GBASE-CR8), IEEE 802.3cd (50GBASE-CR)
- Management: CMIS
- Operating temperature: 0 to 70°C (standard temp)
- Connectors: QSFP-DD to 8x SFP56 integrated ends
- FEC: RS-FEC required per 802.3cd for 50G links (host dependent)
- Latency: Near-zero (no retimers/gearboxes)
- EMI: Shielded twinax with robust pull-latch tabs
- Compatibility: Hosts supporting QSFP56-DD 8x50G breakout and SFP56 50G ports
- RoHS compliant

FAQs

Q: Will 2.5 m work on all platforms?
A: Support for 2.5 m passive 26 AWG links depends on the host’s PHY and FEC. Verify your platform’s DAC reach recommendations.

Q: Is it suitable for TOR to server connections?
A: Yes, it is designed for in-rack or adjacent-rack connections requiring up to 2.5 m reach.

Q: Do I need separate transceivers?
A: No. The QSFP56-DD and SFP56 terminations are integrated with the cable.

Q: Can I break out fewer than eight legs?
A: Unused legs can remain disconnected, but host port configuration must support the desired breakout mode.

Q: What environmental rating does it have?
A: Standard temperature operation: 0 to 70°C.

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