• Arista CAB-D-2Q-400G-1M 400G to 2x200G QSFP-DD DAC cable, 1m
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Arista

Arista CAB-D-2Q-400G-1M | 400G to 2x200G Breakout DAC, QSFP-DD to 2xQSFP, 1 m

CAB-D-2Q-400G-1M

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Description

This passive twinax copper breakout direct attach cable connects a 400G QSFP-DD port to two 200G QSFP ports over a 1 m run. It uses 400GBASE-CR8 on the QSFP-DD end and 2x 200GBASE-CR4 on the QSFP ends, with PAM4 signalling per IEEE 802.3cd. It suits short-reach, in-rack links where a single high-density 400G port needs to feed two 200G devices.

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

Features

- Splits one 400G QSFP-DD port into two 200G QSFP links
- Passive copper design with no active electronics in the cable
- PAM4 signalling for high-speed lane rates
- Suited to short-reach, in-rack connections
- IEEE 802.3cd based 400G and 200G interfaces

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

- Cable type: passive twinax copper direct attach breakout
- Connector A: 1x QSFP-DD (400GBASE-CR8)
- Connector B: 2x QSFP (2x 200GBASE-CR4)
- Aggregate speed: 400G split into 2x 200G
- Length: 1 m
- Standard: IEEE 802.3cd
- Signalling: PAM4

FAQs

Q: What does this cable connect?
A: It connects a single 400G QSFP-DD port on one end to two 200G QSFP ports on the other end, using a 1 m passive twinax copper breakout.

Q: Is this an active or passive cable?
A: It is a passive twinax copper direct attach cable, so there are no active components or separate transceivers involved.

Q: What standard does the cable follow?
A: It follows IEEE 802.3cd, with 400GBASE-CR8 on the QSFP-DD side and 200GBASE-CR4 on each QSFP side, using PAM4 signalling.

Q: How far can this cable run?
A: This version is 1 m long, so it is intended for short links within a rack or between adjacent racks.

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