AristaArista Compatible 400G QSFP-DD QDD SR8 Optical Transceiver
Designed for 400G Ethernet data center and cloud network environments, the Arista Compatible 400G QSFP-DD QDD SR8 Optical Transceiver provides 400Gbps throughput in a QSFP-DD form factor. It operates at 850nm over MMF through a MPO-16/APC connector and supports link lengths up to 70m@OM3/100m@OM4. The module meets QSFP-DD MSA, CMIS 4.0, IEEE 802.3cd and includes digital diagnostic monitoring for live status readout.
Product Highlights
- QSFP-DD form factor, 400Gbps data rate
- Wavelength: 850nm
- Connector: MPO-16/APC
- Reach: up to 70m@OM3/100m@OM4
- Fiber media: MMF
- DDM/DOM: Supported
Specifications
| Arista Networks Compatible | QDD-400G-SR8 |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD |
| Max. Data Rate | 400Gbps |
| Wavelength | 850nm |
| Max. Cable Distance | 70m@OM3/100m@OM4 |
| Connector | MPO-16/APC |
| Media | MMF |
| Transmitter Type | VCSEL 850nm |
| Receiver Type | PIN |
| TX Power | -6.5~4dBm |
| Minimum Receiver Power | -8.4~4dBm |
| Power Budget | 1.9dB |
| Receiver Overload | 4dBm |
| Max. Power Consumption | 10W |
| Extinction Ratio | 3dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation (Electrical) | 8x50G-PAM4 |
| Modulation (Optical) | 8x50G-PAM4 |
| DSP | TX and RX |
| Inbuilt FEC | No |
| Core Size | 50/125µm |
| Packaging Technology | COB (Chip on Board) Packaging |
| MTBF | 1671961 Hours (@40°C, 90% CL) |
| Application | 400G Ethernet |
| Protocols | QSFP-DD MSA, CMIS 4.0, IEEE 802.3cd |
Applications
Built for 400G Ethernet data center and cloud network environments, this QSFP-DD module carries 400Gbps over MMF up to 70m@OM3/100m@OM4 per link. With its MPO-16/APC optical interface, the module works directly with the MMF infrastructure already installed in most facilities. It is interoperable with Arista Networks platforms and replaces the Arista Networks part QDD-400G-SR8 directly. The link runs 8x50G-PAM4 modulation, which keeps it aligned with current 400G switch silicon.
Standards and Compatibility
Compliance: QSFP-DD MSA, CMIS 4.0, IEEE 802.3cd. For projects standardized on Arista Networks hardware, this product replaces the QDD-400G-SR8 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
Our part number for this module is QDD-SR8-400G. When ordering, just let us know the quantity and whether you need the compatibility coding for a particular switch brand; labeling and packaging can also follow your channel requirements.
Worldwide Delivery
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.
Quality Assurance
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.
Packing Details
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.
OEM and Custom Orders
We have manufactured fiber optic connectivity products since 1995 and run our own production lines in Shenzhen. Beyond the standard catalog we build to order: special cable lengths, custom connector combinations, vendor-specific compatibility coding and private labeling. Send us your requirement and our engineers will quote a practical solution.
