400G QSFP-DD to 4 x 100G QSFP56 Passive Copper Breakout DAC Cable

For short reach 400Gbps links in 400G Ethernet data center and cloud network environments, the 400G QSFP-DD to 4 x 100G QSFP56 Passive Copper Breakout DAC Cable offers a factory terminated twinax assembly with QSFP-DD to 4x QSFP56 connectors and a length of Customized. As a passive cable it draws essentially no power and adds no latency to the link. The cable meets SFF-8665, QSFP-DD MSA, IEEE802.3bj, IEEE802.3 cd.

Product Highlights

• QSFP-DD to 4x QSFP56
• Data rate: 400Gbps
• Length: Customized
• Operating temperature: 0 to 70°C (32 to 158°F)

The 400G QSFP-DD to 4 x 100G QSFP56 Passive Copper Breakout DAC Cable connects QSFP-DD to 4x QSFP56 ports at 400Gbps in 400G Ethernet data center and cloud network environments. Ordered in customized lengths, it matches the actual rack geometry without slack. One port becomes 4x QSFP56, a common pattern for connecting newer aggregation ports to an installed base of lower speed equipment. Our factory programs the compatibility coding for your switch brand before shipment and verifies each unit on real host equipment.

This product is designed and tested to comply with SFF-8665, QSFP-DD MSA, IEEE802.3bj, IEEE802.3 cd. It plugs into any standards-based QSFP-DD to 4x QSFP56 port, and compatibility coding for specific switch or router brands can be done in our factory before shipment.

This cable is built to order in customized lengths. Our part number QDD-400G-4QPCxxx identifies the configuration. Wire gauge follows the length: 30AWG for ≤1.5m, 28AWG for 2m~3m. When placing an order, tell us the length you need and any label or packaging requirements. Samples for testing can be arranged before bulk orders.

Our warehouse keeps fast-moving transceivers and cables ready for same-week dispatch. Courier, air freight and sea freight options are all available depending on your budget and schedule, and we consolidate multiple items into one shipment whenever it saves you cost.

We do not ship untested stock. Each transceiver and cable is powered up in our test racks, checked for link stability, transmit power, receiver sensitivity and diagnostic readouts, and only then packed for delivery. This factory-level testing is one reason network integrators keep reordering from us year after year.

Products are first packed into blister trays or self-sealed bags and then into cartons. Standard labels and marks are applied by default, and customized packing and labeling are available on request.

Working directly with the manufacturer means no middleman limits. We support OEM and ODM projects, custom cable assemblies, alternative packaging and compatibility coding for major equipment vendors, with engineering support from the same team that designs our standard products.