400G QSFP-DD 8x 50G PAM4 to 8x 50G SFP56 50G PAM4 Passive Breakout DAC Cable

The 400G QSFP-DD 8x 50G PAM4 to 8x 50G SFP56 50G PAM4 Passive Breakout DAC Cable, 2m provides a 400Gbps copper connection between QSFP-DD to 8x SFP56 ports with a cable length of 2m (7ft). As a passive cable it draws essentially no power and adds no latency to the link. Direct attach copper keeps both latency and power consumption to a minimum, which makes it the economical choice for 400G Ethernet, data center interconnect and 5G transport networks.

Product Highlights

• QSFP-DD to 8x SFP56
• Data rate: 400Gbps
• Cable type: Passive Breakout DAC
• Length: 6 standard options from 0.5m (2ft) to 3m (10ft)
• DDM/DOM: Not Supported

The 400G QSFP-DD 8x 50G PAM4 to 8x 50G SFP56 50G PAM4 Passive Breakout DAC Cable, 2m connects QSFP-DD to 8x SFP56 ports at 400Gbps in 400G Ethernet, data center interconnect and 5G transport networks. This unit is available in 6 standard lengths from 0.5m (2ft) to 3m (10ft). One port becomes 8x SFP56, a common pattern for connecting newer aggregation ports to an installed base of lower speed equipment. Compatibility with Arista Networks systems is verified in our own test lab before shipment, so the unit works out of the box as an equivalent of CAB-D-8S-400G-2M. The link runs QSFP-DD-8x 50G-PAM4 SFP56-50G-PAM4 modulation, which keeps it aligned with current 400G switch silicon.

On the compatibility side, this unit is the practical equivalent of the Arista Networks part CAB-D-8S-400G-2M and works in Arista Networks systems out of the box. Standards compliance covers QSFP-DD MSA, SFF-8432, IEEE 802.3bs-400GAUI-8, IEEE802.3cd-50GAUI-1, CMIS 4.0, SFF-8472.

The standard part number of this assembly is QDD-400G-8SPC. We supply this cable in 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft) and 3m (10ft). Custom lengths beyond this range can also be produced on request. Wire gauge: 28AWG.

Standard packing is an anti-static bag plus blister protection, with cartons sized to keep products from moving in transit. We apply our standard labels by default; neutral packing or customer-branded labels, part number stickers and serial barcodes are all 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.

Standard products are held in stock and usually ship within one to three working days. We dispatch worldwide by DHL, UPS, FedEx, TNT or EMS, and for bulk orders we arrange air or sea freight. Shipments can also be sent collect on your own courier account or delivered to your freight forwarder.

Production samples and every outgoing batch pass through bit-error-rate measurement, temperature verification and plug-in compatibility checks on mainstream switches and routers. Because we are the manufacturer, any issue found in testing is fed back to the production line immediately instead of being passed on to customers.