Arista Networks QDD-400G-4Q4xNAC Compatible 400G QSFP-DD 8 x 50G PAM4 to 4 x 100G QSFP28 4 x 25G NRZ Active Electrical Copper Breakout Cable

This Arista Networks QDD-400G-4Q4xNAC compatible AEC cable provides 400G connectivity through a direct-attach interface. It is an active electrical connection designed to maintain signal integrity at the stated data rate. The series configurations covered on this page are 3m (10ft).

Series Part Number: QDD-400G-4Q4xNACHT Part Number: QDD-400G-4Q4xNAC

Product Highlights

• HT-manufactured compatible alternative for Arista Networks QDD-400G-4Q4xNAC
• 400G aggregate connectivity at 400Gbps
• AEC
• Length configurations covered: 3m (10ft)
• Conductor specification: 30AWG
• Power consumption: ≤8.5W @QSFP-DD, ≤3.5W @QSFP28
• Operating temperature: 0 to 70°C (32 to 158°F)

This series page covers the following verified source length configurations: 3m (10ft). Each documented length-specific OEM reference is treated as its own product configuration; follow the corresponding product link where available. Select the required length when requesting a quotation; custom project lengths are available for discussion.

• QDD-400G-4Q4xNAC03

AEC assemblies are intended for high-speed electrical links that require active signal recovery or retiming. Confirm host support, per-end power consumption and airflow, and keep both ends on the interface and breakout configuration stated in the specifications.

The the stated connector configuration interface and 400G data rate must match the equipment at both ends. For breakout versions, confirm the lane mapping and the speed of every downstream port; matching connector shapes alone does not establish interoperability.

The assembly is configured for equipment that recognizes the QDD-400G-4Q4xNAC series. Before shipment, we check connector identification, link establishment and electrical link stability, signal integrity and diagnostic readouts. Host hardware and firmware revisions can affect third-party cable acceptance, so customers can provide the switch, server or accelerator model and software release for a pre-order compatibility review.

When ordering, specify QDD-400G-4Q4xNAC, the host platform and one of the covered configurations: 3m (10ft). If your purchase documentation uses any of the listed OEM part numbers, include that identifier as well so our team can verify the intended version before production.

Every AEC assembly undergoes continuity and link testing, compatibility verification and a visual inspection of both connector ends. Cables are coiled without exceeding their minimum bend radius, fitted with connector protection and packed in anti-static bags or protective trays before cartoning. Project labels and packing lists are available for volume orders.

Standard configurations normally ship within one to three working days. Worldwide courier, air freight and sea freight options are available, and shipments can also be sent on your own courier account or delivered to an appointed forwarder.