Cisco Compatible 400G QSFP-DD QDD DR4 Si Optical Transceiver
Designed for 400G Ethernet data center and cloud network environments, the Cisco Compatible 400G QSFP-DD QDD DR4 Si Optical Transceiver provides 425Gbps (4x106.25Gb/s) throughput in a QSFP-DD form factor. It operates at 1310nm over SMF through a MPO-12 (APC) connector and supports link lengths up to 500m. The module meets QSFP-DD MSA, IEEE 802.3bs, CMIS 4.1 and includes digital diagnostic monitoring for live status readout.
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
Network architects choose the Cisco Compatible 400G QSFP-DD QDD DR4 Si Optical Transceiver for 400G Ethernet data center and cloud network environments: it runs 425Gbps (4x106.25Gb/s) over SMF and reaches 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. Compatibility with Cisco systems is verified in our own test lab before shipment, so the unit works out of the box as an equivalent of QDD-400G-DR4-S.
Standards and Compatibility
Compliance: QSFP-DD MSA, IEEE 802.3bs, CMIS 4.1. For projects standardized on Cisco hardware, this product replaces the QDD-400G-DR4-S 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-DR4-400G-SI. 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.
Shipping and Lead Time
Standard products are held in stock and usually ship within one to three working days. We dispatch worldwide by DHL, UPS, FedEx, TNT or EMS, and for bulk orders we arrange air or sea freight. Shipments can also be sent collect on your own courier account or delivered to your freight forwarder.
Tested Before Shipment
We do not ship untested stock. Each transceiver and cable is powered up in our test racks, checked for link stability, transmit power, receiver sensitivity and diagnostic readouts, and only then packed for delivery. This factory-level testing is one reason network integrators keep reordering from us year after year.
Packaging
Each unit is sealed in an anti-static bag, cushioned in a blister tray and boxed in an export-grade carton. Outer cartons carry handling marks and can be palletized for air or sea freight. If your project requires retail boxes, barcodes or your own brand on the label, we can arrange that as well.
Factory Custom Capability
Working directly with the manufacturer means no middleman limits. We support OEM and ODM projects, custom cable assemblies, alternative packaging and compatibility coding for major equipment vendors, with engineering support from the same team that designs our standard products.
