Designed for 400G Ethernet data center and cloud network environments, the Cisco Compatible 400G QSFP-DD QDD SR4.2 Optical Transceiver provides 425Gbps throughput in a QSFP-DD form factor. It operates at 850nm,910nm over MMF through a MTP/MPO-12 (UPC) connector and supports link lengths up to 70m@OM3/150m@OM5. The module meets QSFP-DD MSA, IEEE 802.3-2015 and includes digital diagnostic monitoring for live status readout.
Product Highlights
- QSFP-DD form factor, 425Gbps data rate
- Wavelength: 850nm,910nm
- Connector: MTP/MPO-12 (UPC)
- Reach: up to 70m@OM3/150m@OM5
- Fiber media: MMF
- DDM/DOM: Supported
Specifications
| Cisco Compatible | QDD-400G-SR4.2-BD |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD |
| Max. Data Rate | 425Gbps |
| Wavelength | 850nm,910nm |
| Max. Cable Distance | 70m@OM3/150m@OM5 |
| Connector | MTP/MPO-12 (UPC) |
| Media | MMF |
| Transmitter Type | VCSEL 850nm |
| Receiver Type | PIN |
| TX Power | -6.5dBm~4dBm |
| Minimum Receiver Power | -8.5dBm |
| Power Budget | 2dB |
| Receiver Overload | 4dBm |
| Max. Power Consumption | 12W |
| 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 |
| Protocols | QSFP-DD MSA, IEEE 802.3-2015 |
Applications
Built for 400G Ethernet data center and cloud network environments, this QSFP-DD module carries 425Gbps over MMF up to 70m@OM3/150m@OM5 per link. The MTP/MPO-12 (UPC) interface and 850nm,910nm 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-SR4.2-BD.
Standards and Compatibility
On the compatibility side, this unit is the practical equivalent of the Cisco part QDD-400G-SR4.2-BD and works in Cisco systems out of the box. Standards compliance covers QSFP-DD MSA, IEEE 802.3-2015.
Ordering Information
Order this product as QDD-SR4.2-400G. 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.
Delivery
Goods are normally sent by courier such as DHL, UPS, FedEx, TNT or EMS; air and sea freight are also available on request. Commonly used items are kept in stock for immediate shipment, and out-of-stock items are usually delivered within a few working days. We can also ship on your courier account or hand goods to your appointed forwarder.
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.
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.
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.