Dell QDD-400G-2QPC Compatible 400G QSFP-DD 8 x 50G PAM4 to 2 x 200G QSFP56 4 x 50G PAM4 Passive Copper Breakout Cable

Use this DAC cable where a 400G link is required between compatible direct-attach ports. This HT version corresponds to Dell QDD-400G-2QPC and covers 1m (3ft) and 2m (7ft); electrical or optical construction follows the DAC specification rather than a detachable transceiver-and-patch-cord arrangement.

Series Part Number: QDD-400G-2QPCHT Part Number: QDD-400G-2QPC

Product Highlights

• HT-manufactured compatible alternative for Dell QDD-400G-2QPC
• 400G aggregate connectivity at 400Gbps
• Passive Twinax / Copper
• Length configurations covered: 1m (3ft) and 2m (7ft)
• Conductor specification: 30AWG
• Power consumption: 0.1W (QSFP-DD End) 0.1W (QSFP56 Per End)
• Operating temperature: 0 to 70°C (32 to 158°F)

This series page covers the following verified source length configurations: 1m (3ft) and 2m (7ft). 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-2QPC01

Passive DAC assemblies are normally used for short switch-to-switch, switch-to-server and rack-adjacent links. They draw very little power and avoid separate optical components, but the selected length must remain within the host and cable specification.

The the stated connector configuration interface and 400G data rate must match the equipment at both ends. The source application is listed as 400G Ethernet. 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-2QPC 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-2QPC, the host platform and one of the covered configurations: 1m (3ft) and 2m (7ft). 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 DAC 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.