5m (16ft) NVIDIA/Mellanox QDD-400G-AC05 Compatible 400G QSFP-DD 8 x 50G PAM4 Ethernet Active Copper Twinax Cable

This QDD-400G-AC05 compatible ACC cable provides a 400G direct connection for NVIDIA/Mellanox equipment in a fixed 5m (16ft) configuration. The QSFP-DD assembly integrates both ends and the cable, giving data-center designers one defined product to evaluate for reach, rack layout, airflow and host compatibility.

OEM Part Number: QDD-400G-AC05HT Part Number: QDD-400G-AC

Product Highlights

400G ACC direct-attach assembly
Exact cable length: 5m (16ft)
QSFP-DD interface configuration
Copper cable media
Prepared for hosts requiring NVIDIA/Mellanox QDD-400G-AC05

Specifications

Part Number	QDD-400G-AC05
Form Factor	QSFP-DD
Max. Data Rate	425Gbps
Media	Copper
Cable Type	Active Twinax
Cable Length	5m (16ft)
Wire AWG	28AWG
Minimum Bend Radius	80mm
Max. Power Consumption	2.5W Per End
Jacket Material	PVC
Commercial Temperature Range	0 to 70°C (32 to 158°F)
Protocols	QSFP-DD MSA, SFF-8636
OEM Part Number	QDD-400G-AC05
Host Compatibility	NVIDIA/Mellanox
Manufacturer	HT

Exact Length and Product Identity

This product page covers QDD-400G-AC05 in 5m (16ft). The OEM reference, physical length and HT factory configuration should remain together on the purchase order and receiving record. Other reaches or compatibility identities must be selected and verified separately rather than assumed to be interchangeable.

Cable Construction and Installation Planning

This 5m (16ft) active copper assembly connects compatible QSFP-DD ports without separate optical modules. Confirm the aggregate rate, lane configuration and host operating mode before installation. Support the complete twinax run, preserve connector access and do not crease the cable or force it into a tight service loop.

Data-Center Design and Airflow

Select the assembly by both reach and rack layout. A direct connection removes separate module-and-patch-cord interfaces, but it still needs a bend-safe pathway and clear connector access. Keep cable bundles from blocking front-panel airflow, account for the listed interface power where applicable and choose a length that supports maintenance without leaving an unmanaged coil.

NVIDIA/Mellanox Compatibility and Factory Testing

Compatibility confirmation combines host identification with actual link establishment and diagnostic checks. The assembly is prepared for the stated OEM reference rather than selected only by connector shape. For a new data-center deployment, the equipment model, port mode and software release provide the most useful basis for a pre-order review. Factory acceptance covers both connector housings, host identification, live-link stability and diagnostic indications where the platform exposes them. The assembly is checked as the exact active copper configuration and length listed here.

Ordering Information

Provide the OEM reference, HT part number, fixed length and quantity, together with the intended host interfaces. Rack-based quantities and packaging instructions can be included for larger deployments. Other lengths are separate products and should be entered on their own order lines. This page describes QDD-400G-AC05 in 5m (16ft); quote this exact reference and length together with quantity and the intended host platform.

Quality Assurance and Packaging

Each cable receives connector inspection and a functional link check before it is coiled with bend-safe slack and packed. Protective materials shield the connector housings during transport. Rack or project labels are available to keep length, part number and installation destination aligned.

Shipping and Lead Time

Available stock is generally dispatched within one to three working days after order confirmation, with production lead times advised for larger quantities. Delivery can be arranged by courier, air freight or sea freight, and goods may instead be handed to an appointed forwarder or shipped on the customer’s courier account.