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Arista

Arista CAB-D-8S-400G-2.5 | 400G QSFP-DD to 8x SFP56 DAC Breakout Cable, 2.5m

CAB-D-8S-400G-2.5

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Description

This passive copper twinax direct attach breakout cable connects one 400G QSFP-DD port to eight 50G SFP56 ports over a 2.5 metre run. It supports 400GBASE-CR8 and 50GBASE-CR, making it a cost-effective option for short-reach connections within a rack or between adjacent racks. It suits data centre deployments that need to split a single 400G switch port into eight 50G server or storage links without optics.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Breaks out one 400G QSFP-DD port into eight 50G SFP56 ports
- Passive copper twinax construction with no optics required
- Supports 400GBASE-CR8 and 50GBASE-CR
- 2.5m length for in-rack and adjacent-rack connections

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

Datasheet

Technical Specifications

- Cable type: passive DAC twinax copper breakout
- Host-side connector: 1x 400G QSFP-DD
- Breakout-side connectors: 8x 50G SFP56
- Standards: 400GBASE-CR8 / 50GBASE-CR
- Length: 2.5m
- Media: copper (no wavelength)

FAQs

Q: What does this cable connect?
A: It connects one 400G QSFP-DD port to eight 50G SFP56 ports using a single passive copper breakout cable.

Q: Is this an active or passive cable?
A: It is a passive direct attach copper twinax cable, so it contains no optical components and has no wavelength.

Q: Which Ethernet standards does it support?
A: It supports 400GBASE-CR8 on the QSFP-DD side and 50GBASE-CR on each of the eight SFP56 breakout legs.

Q: How long is the cable and where is it best used?
A: The cable is 2.5m long, which suits short-reach links within a rack or between neighbouring racks in a data centre.

Datasheet

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