400G QSFP-DD 8x 50G PAM4 to 8x 50G SFP56 50G PAM4 Passive Breakout DAC Cable, 2m

The 400G QSFP-DD 8x 50G PAM4 to 8x 50G SFP56 50G PAM4 Passive Breakout DAC Cable, 2m is a passive breakout dac direct attach copper cable with QSFP-DD to 8x SFP56, supporting 400Gbps links over a length of 2m (7ft). 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 interconnect and 5G transport networks, and complies with QSFP-DD MSA, SFF-8432, IEEE 802.3bs-400GAUI-8, IEEE802.3cd-50GAUI-1, CMIS 4.0, SFF-8472.
Product Highlights
- QSFP-DD to 8x SFP56
- Data rate: 400Gbps
- Cable type: Passive Breakout DAC
- Length: 6 standard length options (0.5m (2ft) to 3m (10ft))
- DDM/DOM: Not Supported
Specifications
| Arista Networks Compatible | CAB-D-8S-400G-2M |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD to 8x SFP56 |
| Max. Data Rate | 400Gbps |
| Media | Copper |
| Cable Type | Passive Breakout DAC |
| Minimum Bend Radius | 39.5mm |
| Wire AWG | 28AWG |
| Cable Length | 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft), 3m (10ft) |
| Jacket Material | PVC (OFNR) |
| Max. Power Consumption | 0.1W (QSFP-DD End) 0.1W (SFP56 Per End) |
| Modulation Format | QSFP-DD-8x 50G-PAM4 SFP56-50G-PAM4 |
| DDM/DOM | Not Supported |
| Protocols | QSFP-DD MSA, SFF-8432, IEEE 802.3bs-400GAUI-8, IEEE802.3cd-50GAUI-1, CMIS 4.0, SFF-8472 |
Applications
In 400G Ethernet, data center interconnect and 5G transport networks, the 400G QSFP-DD 8x 50G PAM4 to 8x 50G SFP56 50G PAM4 Passive Breakout DAC Cable, 2m provides a factory terminated 400Gbps link between QSFP-DD to 8x SFP56 ports. This unit is made 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.
Standards and Compatibility
Compliance: QSFP-DD MSA, SFF-8432, IEEE 802.3bs-400GAUI-8, IEEE802.3cd-50GAUI-1, CMIS 4.0, SFF-8472. For projects standardized on Arista Networks hardware, this product replaces the CAB-D-8S-400G-2M directly, with identical fit and function. 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.
Ordering Information
The part number for this assembly is QDD-400G-8SPC. We offer this cable in 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft) and 3m (10ft). Other lengths can be custom manufactured on request. Wire gauge: 28AWG.
How We Pack
Transceivers and cables are individually protected against static and dust, then consolidated into sturdy cartons suitable for international courier shipment. For larger orders we shrink-wrap and strap cartons onto pallets. Tell us your warehouse or retail requirements and we will pack accordingly.
Custom-made Fiber Products
As a manufacturer serving the fiber optic industry since 1995, we have strong in-house manufacturing and design capability. From early GBIC, Xenpak and X2 modules to today's SFP, SFP+, QSFP, QSFP-DD and OSFP products, we grow together with the industry. OEM and custom-designed transceivers and cables are welcome, and our factory-direct pricing is very competitive compared with online retail stores.
Delivery
Goods are normally sent by courier such as DHL, UPS, FedEx, TNT or EMS; air and sea freight are also available on request. Commonly used items are kept in stock for immediate shipment, and out-of-stock items are usually delivered within a few working days. We can also ship on your courier account or hand goods to your appointed forwarder.
Our Testing Process
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.
