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Arista

Arista CAB-D-8S-400-2.5 | 400G QSFP-DD to 8x50G SFP Breakout DAC Cable, 2.5m

CAB-D-8S-400-2.5

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Description

Passive twinax copper direct attach breakout cable that splits one 400G QSFP-DD port into eight 50G SFP connections. Supporting 400GBASE-CR8 on the QSFP-DD end and 50GBASE-CR on each SFP leg, it provides a short-reach, low-latency link without separate optical transceivers. The 2.5m length suits in-rack and adjacent-rack connections between high-density 400G switches and 50G servers or storage.

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

Features

- Splits a single 400G QSFP-DD port into eight 50G SFP links
- Passive twinax copper construction requires no separate optical transceivers
- Suited to short-reach top-of-rack and adjacent-rack connections
- Supports 400GBASE-CR8 and 50GBASE-CR signalling

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

- Breakout configuration: 1 x 400G QSFP-DD to 8 x 50G SFP
- Standards: 400GBASE-CR8 / 50GBASE-CR
- Cable type: Passive twinax copper
- Length: 2.5m

FAQs

Q: What does this breakout cable connect?
A: It connects one 400G QSFP-DD port to eight separate 50G SFP ports, allowing a single high-speed switch port to serve multiple 50G devices.

Q: Is this a passive or active cable?
A: It is a passive twinax copper cable, so it contains no powered optical components and is intended for short-reach connections.

Q: What length is this cable?
A: This SKU is 2.5m. Other lengths are separate SKUs, so confirm the length that suits your rack layout before ordering.

Q: Which standards does it support?
A: The QSFP-DD end uses 400GBASE-CR8 and each of the eight SFP legs uses 50GBASE-CR.

Q: Can it be used for long-distance links between buildings?
A: No. Passive copper DACs are designed for short in-rack or adjacent-rack runs. For longer distances, use fibre cabling with suitable optical transceivers.

Datasheet

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