400G QSFP-DD DAC Cables

400G QSFP-DD DAC Cables selection guide
PHILISUN 400G QSFP-DD DAC Cables are direct attach copper cable options for data center spine, leaf, GPU server and storage fabric links. Use this collection to compare part numbers for short in-rack switch, server, storage and GPU interconnects where low latency and low power matter. Confirm the QSFP-DD host cage, firmware policy and port speed before ordering.
How to specify 400G QSFP-DD DAC Cables

Match the host: confirm switch or NIC vendor, port type, lane rate, EEPROM coding policy and required diagnostic support.
Check the link budget: review cable length, AWG, passive or active requirement, host coding, bend radius, airflow and power budget before choosing the final part number or cable length.
Plan the rack route: allow for bend radius, airflow, labeling, cable management and hot aisle or cold aisle service access.
Request evidence: ask for compatibility notes, electrical or optical test records, serial labels and packaging groups when the project needs traceability.

Compare this category with the DAC cable hub, the broader AOC/DAC/ACC/AEC cable overview, related optical transceivers and the fiber optic products hub. For custom length, coding or sampling support, contact PHILISUN.
400G QSFP-DD DAC Cables FAQ
When should I choose 400G QSFP-DD DAC Cables?
Choose this DAC category when the host port, speed and cable technology match the rack distance, power budget and compatibility requirements of the link.
What information is needed for compatibility?
Share the switch or adapter model, required speed, cable length, preferred coding, operating temperature and any vendor-specific compatibility policy.
Can PHILISUN supply custom versions?
Yes. PHILISUN can support custom length, labeling, packaging, coding, test documentation and project BOM review for qualified data center and telecom deployments.