400GBASE-DR4 QSFP-DD Module for 400G Links
The 400GBASE-DR4 QSFP-DD module is a 400G single-mode module for high-density data center interconnects, listed at 1310nm over up to 500m on single-mode fibre with forward error correction. It carries four parallel 100G channels in one module, which is how a single QSFP-DD module reaches 400G without moving to a larger form factor.
What this module is listed as
The listed standard for this module is IEEE 802.3bs 400GBASE-DR4 with the QSFP-DD MSA, using an 8-lane electrical interface at 53.125 gigabits per second per lane and a per-channel data rate of 106.25 gigabits per second with PAM4 signalling. The four optical channels run in parallel at 1310nm, each carrying 100G, and the module uses an MPO-12 connector. The operating case temperature is listed as 0 to 70 degrees Celsius, and the single power supply is 3.3V with a listed power consumption of 12W.
The distance figure of up to 500m is stated with forward error correction, which is part of the link design rather than an optional extra. A host that cannot support the required error correction, or a link whose loss budget exceeds the design, will not achieve the listed reach even at 500m. Name the host platform and the link length in the enquiry so the combination can be confirmed rather than assumed from the rate alone.
Stock and compatibility statements - read carefully
A frequently asked question on the source page for this module mentions a large quantity of modules kept in stock. That statement is reproduced here only as a source-page self-statement about stock, and it is not presented as an availability guarantee for any order. Stock for a specific order, quantity and version must be confirmed in the enquiry, because a general stock statement does not commit a quantity, a version or a delivery date.
Compatibility is handled the same way. The source page's compatibility question names one host platform family, and this page names that family only as a source-page statement, without reproducing a longer list of brand names from the source page and without presenting any list as a confirmed compatibility catalogue. If compatibility with a particular platform matters for your order, name the platform in the enquiry and ask for it to be confirmed for this model.
Where this module fits
The listed applications for this module are 400G Ethernet, InfiniBand-style interconnects as spelled on the source page, and data center enterprise networking. Those applications describe high-density interconnects between switches and servers inside a data center, where a single 400G module replaces four 100G modules and saves faceplate space. The module is not a general-purpose long-reach module: its listed reach is 500m on single-mode fibre, and longer links need a different module family with a different listed reach.
The listed transmit power range is minus 2.9 to plus 4 dBm and the listed receive sensitivity range is minus 5.9 to plus 4 dBm, with an extinction ratio of 3.5 dB. Those figures belong to this model only. They must not be copied to any other 400G module, and they do not describe the 800G range sentence that appears elsewhere on this site, for which no product is listed for sale here.
Specification - as listed for this model
| Item | Listed value |
|---|---|
| Model | 400GBASE-DR4 QSFP-DD |
| Rate | 400G (4 parallel channels, 100G per channel) |
| Standards stated | IEEE 802.3bs 400GBASE-DR4; QSFP-DD MSA; 8 x 53.125 Gb/s electrical interface |
| Per-channel data rate | 106.25 Gbps (PAM4) per channel |
| Centre wavelength | 1310nm |
| Distance | Up to 500m on single-mode fibre (SMF) with forward error correction |
| Connector | MPO-12 connector; QSFP-DD connector |
| Transmit power | -2.9 to 4 dBm |
| Receive sensitivity | -5.9 to 4 dBm |
| Extinction ratio | 3.5 dB |
| Power consumption | 12W |
| Power supply | Single 3.3V |
| Laser and receiver devices (source table wording) | EML lasers and PIN devices |
| Operating case temperature | 0 to 70 degrees Celsius |
| Compliance statement | RoHS compliant (as stated on the source page) |
| Stock statement - source-page self-statement only | A source-page question mentions a large stocked quantity. This is not an availability guarantee; confirm stock, version and quantity per order in the enquiry. |
| Compatibility - source-page statement only | Compatibility is stated only as a source-page statement for one host platform family. Name your platform in the enquiry for per-order confirmation; no longer brand list is published here. |
Values above are taken from the listed specification for this model only. They are not a range-wide promise. Items not listed here are confirmed per model in the enquiry, and any conflict inside the source pages is flagged on the page rather than resolved by choosing one value.
Enquiry checklist
Before sending an enquiry, note the model or the rate you need, the wavelength, the fibre type, the distance, the connector, the quantity and the application. State whether the module must be compatible with a named host platform, and name any certification document you need. Minimum order quantity and lead time are unavailable at company level and are confirmed per model in the enquiry. Quotations are confirmed per order.
Send an enquiry | Sales contact: Ms. Vicky Tian, Sales Manager, +86 19860146913 | Telephone: 86-0755-82552969 | Email: [email protected]
Frequently asked questions
Is the stocked quantity on the source page a guarantee?
No. A general stock statement does not commit a quantity, a version or a delivery date for a specific order. Confirm stock for your order, quantity and version in the enquiry.
Which host platforms is this module compatible with?
This page names compatibility only as a source-page statement for one host platform family and does not publish a longer brand list. Name your platform in the enquiry and ask for compatibility to be confirmed for this model.
How do I get a quotation?
Send an enquiry naming the model, the rate, the wavelength, the distance and the quantity you need, plus the application. Quotations are confirmed per order, and specifications are confirmed per model before payment. This site does not list fixed selling figures, and no price is shown for any model.
What certification documents can you provide?
The company states ISO 9001, CE, FC, 3C and RoHS names. Certificates are available upon request. If a buyer needs a certificate for a specific model, name the model in the enquiry so the correct document can be checked. No certificate numbers are published on this site.
Do the specifications on one page apply to the whole range?
No. Specifications are shown per model and must not be read across the whole range. Where a value is not listed for a model, the page says to confirm per model rather than filling in a generic figure, and where the source pages disagree, the page flags the conflict instead of choosing one value as fact.
What are the minimum order quantity and lead time?
At company level both are unavailable on this site and are confirmed per model in the enquiry. A single-model note, where one exists, is marked as applying to that model only and must not be read as a company-wide term.