CiscoCisco Compatible 400G QSFP-DD QDD DR4 Si Optical Transceiver
The Cisco Compatible 400G QSFP-DD QDD DR4 Si Optical Transceiver is a QSFP-DD optical transceiver delivering 425Gbps (4x106.25Gb/s) over SMF. Operating at 1310nm with a MPO-12 (APC) interface, it reaches 500m and is compliant with QSFP-DD MSA, IEEE 802.3bs, CMIS 4.1. Built-in digital diagnostics give real-time access to operating parameters, making the module easy to deploy and maintain in 400G Ethernet data center and cloud network environments.
Product Highlights
- QSFP-DD form factor, 425Gbps (4x106.25Gb/s) data rate
- Wavelength: 1310nm
- Connector: MPO-12 (APC)
- Reach: up to 500m
- Fiber media: SMF
- DDM/DOM: Supported
Specifications
| Cisco Compatible | QDD-400G-DR4-S |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD |
| Max. Data Rate | 425Gbps (4x106.25Gb/s) |
| Wavelength | 1310nm |
| Max. Cable Distance | 500m |
| Connector | MPO-12 (APC) |
| Media | SMF |
| Transmitter Type | DFB |
| Receiver Type | PIN |
| TX Power | -2.9~4.0dBm |
| Minimum Receiver Power | -5.9dBm |
| Power Budget | 3dB |
| Receiver Overload | 4dBm |
| Max. Power Consumption | 10W |
| Extinction Ratio | 3.5dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation (Electrical) | 8x50G-PAM4 |
| Modulation (Optical) | 4x100G-PAM4 |
| DSP | TX and RX |
| Host FEC | Supported |
| Protocols | QSFP-DD MSA, IEEE 802.3bs, CMIS 4.1 |
Applications
The Cisco Compatible 400G QSFP-DD QDD DR4 Si Optical Transceiver is used in 400G Ethernet data center and cloud network environments, where it provides a 425Gbps (4x106.25Gb/s) link over SMF up to 500m. The MPO-12 (APC) interface and 1310nm optics match the standard cabling plant used in modern data halls, so existing trunks can be reused. For networks standardized on Cisco hardware, it is a drop-in equivalent of the QDD-400G-DR4-S.
Standards and Compatibility
On the compatibility side, this unit is the practical equivalent of the Cisco part QDD-400G-DR4-S and works in Cisco systems out of the box. Standards compliance covers QSFP-DD MSA, IEEE 802.3bs, CMIS 4.1.
Ordering Information
Order this product as QDD-DR4-400G-SI. Common models are stocked for fast dispatch. We can supply the module with neutral or customer-branded labels, and compatibility coding for a specific equipment vendor can be added at no extra process step.
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.
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.
Built to Your Spec
Our product line has grown with the industry for three decades, from GBIC-era modules to today's 800G and 1.6T interconnects. If the exact configuration you need is not listed, we can usually build it: custom lengths, mixed connector breakouts, OEM branding and project-specific firmware coding are all supported.
