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
The Arista Compatible 400G QSFP-DD QDD SR8 Optical Transceiver is used in 400G Ethernet data center and cloud network environments, where it provides a 400Gbps link over MMF up to 70m@OM3/100m@OM4. Digital diagnostics report transmit power, receive power and temperature in real time, which simplifies commissioning and ongoing maintenance. 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
To order, quote QDD-SR8-400G together with your quantity. Stock items ship quickly; for OEM orders we support custom labels, retail packing and vendor-specific coding, all handled in our own factory.
Customization Service
Because we are the factory, customization is straightforward: non-standard lengths, different jacket materials, specific polarity or breakout wiring, and compatibility programming for particular switch brands are all routine work for us. Small trial orders are accepted so you can verify quality before scaling up.
Logistics
Our warehouse keeps fast-moving transceivers and cables ready for same-week dispatch. Courier, air freight and sea freight options are all available depending on your budget and schedule, and we consolidate multiple items into one shipment whenever it saves you cost.
Reliability Control
From incoming component inspection to final burn-in, quality is controlled at each step of production. Finished units are verified on real networking equipment in our compatibility lab, and test records are kept per batch so that any field question can be traced back quickly.
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.