Description
The AddOn Arista Networks® CAB-D-D-400G-3M compatible direct attach cable delivers reliable 400GBase-CU performance with QSFP-DD to QSFP-DD connectivity over a maximum reach of 3 meters (9.8 feet). Built with passive twinax copper, this cable is designed to meet MSA standards for seamless interoperability and network compatibility. Each unit is programmed, uniquely serialized, and rigorously traffic tested to ensure flawless functionality in your environment.
This direct attach cable is TAA compliant, making it suitable for government procurement, and it comes backed by AddOn’s limited lifetime warranty, ensuring both compliance and long-term reliability.
| Category | Specification |
|---|---|
| SKU | CAB-D-D-400G-3M-AO |
| Compatible OEM | Arista Networks® |
| Form Type | QSFP-DD to QSFP-DD |
| Speed | 400GBase |
| Speed Description | 400-Gigabit |
| Media | Copper |
| Cable Type | Direct Attach Copper (DAC), Passive Twinax |
| Length (m) | 3 |
| Length (ft) | 9.8 |
| Active or Passive | Passive |
| Transceiver Type | CU |
| Digital Optical Monitoring (DOM) | Not applicable (copper DAC) |
| TAA Compliant | Yes |
| Product Shipping Dimensions (H x W x D) | 1.5 in. x 9 in. x 12 in. |
| Product Shipping Weight | 0.4 lb |
| ECCN | 5A991 |
| HTS Code (US) | 8517.62.0090 |
| HTS Code (UK) | 85176200 |
| UNSPSC Code | 26121609 |
| UPC Code | 195285822024 |
| What’s in the Box | 1x QSFP-DD to QSFP-DD direct attach cable |
| Warranty | Limited Lifetime Warranty |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
A decade of delivery — trusted by 275+ clients across industries
