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

The 400G QSFP-DD to 4 x 100G QSFP56 Passive Copper Breakout DAC Cable is a twinax direct attach copper cable with QSFP-DD to 4x QSFP56, supporting 400Gbps links over a length of Customized. As a passive cable it draws essentially no power and adds no latency to the link. It is a cost effective, low latency interconnect for 400G Ethernet data center and cloud network environments, and complies with 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)

Designed for 400G Ethernet data center and cloud network environments, the 400G QSFP-DD to 4 x 100G QSFP56 Passive Copper Breakout DAC Cable carries 400Gbps between QSFP-DD to 4x QSFP56 interfaces. Ordered in customized lengths, it matches the actual rack geometry without slack. By fanning one port out to 4x QSFP56, it doubles or quadruples the number of endpoints served per switch port and keeps the cabling plant simple. Custom labeling, packaging and compatibility coding for specific equipment vendors are available from our factory on request. The link runs QSFP-DD-8x 50G-PAM4 QSFP56-2x 50G-PAM4 modulation, which keeps it aligned with current 400G switch silicon.

Compliance: SFF-8665, QSFP-DD MSA, IEEE802.3bj, IEEE802.3 cd. Every unit's EEPROM coding and link behavior are verified on real host equipment in our lab, so what arrives at your site is ready to use.

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.

We ship to customers around the world every week. Express couriers handle most orders door to door in a few days; larger consignments go by air or sea to keep freight costs down. Tracking information is provided for every shipment, and we are flexible on shipping accounts and forwarders.

Before any product leaves our factory it goes through optical performance testing, compatibility verification on real switch platforms and a final visual inspection. Our in-house test lab holds a wide range of current and legacy switches from major brands, so interoperability is proven on the actual equipment your network uses rather than assumed from paper specifications.

Default packaging is simple and protective: sealed bag, blister tray, export carton. For OEM customers we also offer white-label packing, custom printed boxes and per-unit labeling with your own part numbers, so the goods can go straight into your sales channel.

Our product line has grown with the industry for three decades, from GBIC-era modules to today's 800G and 1.6T interconnects. If the exact configuration you need is not listed, we can usually build it: custom lengths, mixed connector breakouts, OEM branding and project-specific firmware coding are all supported.