QDD-400G-VSR4 QDD-400G-VR4 400G QSFP-DD VR4 50m
400G QSFP-DD VR4 50m Transceiver with 5 exact SKU options. Confirm the host, port and firmware before quotation.
400G QSFP-DD commercial optics
Choose 400G QSFP-DD Transceivers by Reach, Fiber Interface and Network Role
Compare each 400G QSFP-DD transceiver family for multimode, parallel single-mode and duplex single-mode links, then resolve host coding and an exact SKU.
- Separate SR8, DR4, FR4, LR4 and ER4-class link requirements
- Match MPO or LC interfaces to the existing fiber plant
- Include host software, FEC and peer-optic details in the review
- Use measured route loss for longer links
13verified catalog families
75exact SKU options
6-stepquotation workflow
SKU-leveldocument confirmation
Exact catalog records
Browse 400G QSFP-DD Transceivers
Use product identity, structured specifications and exact SKU records. Search results do not assert live stock or host acceptance.
Arista QDD-400G-ZR 400G QSFP-DD Transceiver
400G QSFP-DD Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
QDD-400G-ZRP QDD-400G-ZR+ 400G QSFP-DD Transceiver
400G QSFP-DD Transceiver with 7 exact SKU options. Confirm the host, port and firmware before quotation.
DP04QSDD-HE0 QDD-400G-ZRP+ 400G QSFP-DD Transceiver
400G QSFP-DD Transceiver with 5 exact SKU options. Confirm the host, port and firmware before quotation.
NVIDIA/Mellanox QDD-400G-ER4 400G QSFP-DD ER4
400G QSFP-DD ER4 40km Transceiver with 5 exact SKU options. Confirm the host, port and firmware before quotation.
NVIDIA/Mellanox QDD-400G-ER8 400G QSFP-DD ER8
400G QSFP-DD ER8 40km Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
NVIDIA/Mellanox QDD-400G-LR8 400G QSFP-DD LR8
400G QSFP-DD LR8 10km Transceiver with 5 exact SKU options. Confirm the host, port and firmware before quotation.
NVIDIA/Mellanox QDD-400G-XDR4 400G QSFP-DD XDR4
400G QSFP-DD XDR4 2km Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
NVIDIA/Mellanox QDD-400G-SR4 400G QSFP-DD SR4
400G QSFP-DD SR4 100m Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
MMA1U00-WS QDD-400G-SR8 400G QSFP-DD SR8 100m
400G QSFP-DD SR8 100m Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
980-9I16Y-00W000 QDD-400G-DR4 400G QSFP-DD DR4
400G QSFP-DD DR4 500m Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
MMS1V50-WM QDD-400G-FR4 400G QSFP-DD FR4 2km
400G QSFP-DD FR4 2km Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
MMS1V90-WR QDD-400G-LR4 400G QSFP-DD LR4 10km
400G QSFP-DD LR4 10km Transceiver with 6 exact SKU options. Confirm the host, port and firmware before quotation.
13 product families available; page 1 of 1
Commercial overview
One 400G form factor, multiple installation outcomes
400G QSFP-DD covers links from short multimode rows to parallel single-mode data-center paths and duplex-fiber campus or DCI-edge routes. PhotonVerge separates these architectures so a buyer can shortlist by actual connector, route and peer optic rather than by rate alone. A review should include the host and line card, network OS, FEC, link distance, fiber plant, quantity and delivery location. The resulting offer can identify the exact candidate SKU and any technical or documentary assumptions still requiring approval.
A collection for buyers who have confirmed the QSFP-DD host
Good starting point
- 400G Ethernet leaf-spine and aggregation links
- migration projects comparing parallel and duplex-fiber optics
- enterprise, cloud and DCI-edge routes using direct-detect optics
- OEM part-number reviews where a compatible alternative may be evaluated
Start elsewhere when
- OSFP or QSFP112 host ports
- coherent 400ZR or OpenZR+ transport requirements
- short fixed-cable links where serviceability does not require pluggable optics
Product taxonomy
Organize 400G QSFP-DD by the installed route
Nominal scheme names guide the shortlist; exact reach and interoperability come from the selected SKU and peer-end review.
SR8
Parallel multimode for controlled short-reach data-center fiber plants.
DR4
Parallel single-mode for short data-center links and selected breakout designs.
FR4
Duplex single-mode for lower fiber count and medium data-center reach.
LR4
Duplex single-mode for longer campus or data-center routes requiring a link budget.
ER4-class
Extended direct-detect reach requiring careful loss, dispersion and peer support review.
Featured family routes
Compare product families
These links open exact family records; use the full browser for the complete set.
QDD-400G-VSR4 QDD-400G-VR4 400G QSFP-DD VR4 50m5 exact SKU optionsArista QDD-400G-ZR 400G QSFP-DD Transceiver6 exact SKU optionsQDD-400G-ZRP QDD-400G-ZR+ 400G QSFP-DD Transceiver7 exact SKU optionsDP04QSDD-HE0 QDD-400G-ZRP+ 400G QSFP-DD Transceiver5 exact SKU optionsNVIDIA/Mellanox QDD-400G-ER4 400G QSFP-DD ER45 exact SKU optionsNVIDIA/Mellanox QDD-400G-ER8 400G QSFP-DD ER86 exact SKU optionsBuyer checklist
The 400G decisions that belong in the RFQ
These factors determine whether two candidates solve the same link.
Host port
Record platform, line card, software and the exact QSFP-DD cage.
Link role
Define switch-to-switch, switch-to-router, breakout or transport handoff.
Optical scheme
Select SR8, DR4, FR4, LR4 or an approved extended-reach option.
Fiber plant
Confirm MPO or LC, multimode or single-mode, polarity, panels and patch points.
Route loss
Use a link budget for longer paths and document operating margin.
FEC and peer
Identify the far-end optic and required error-correction mode.
Power and temperature
Check module power class against cage and airflow limits.
Coding and operations
Specify identity, DOM, alarms, labels and spares policy.
Decision matrix
400G QSFP-DD architecture comparison
Confirm exact values on the candidate SKU; the table shows which project variable changes.
| Scheme family | Fiber pattern | Common buying reason | Critical confirmation |
|---|---|---|---|
| SR8 | Parallel multimode | Short links in a known multimode plant | Fiber grade, MPO interface and polarity |
| DR4 | Parallel single-mode | Short single-mode links or selected breakouts | Peer lane mapping and connector |
| FR4 | Duplex single-mode | Reduced fiber count over data-center reaches | Link budget, FEC and peer PMD |
| LR4 | Duplex single-mode | Longer campus or facility routes | Total loss and operating margin |
| ER4-class | Duplex single-mode | Extended direct-detect routes | Exact standard, receive limits and peer support |
Engineering boundary
Host coding and optical PMD must both match
A compatible code can address host identification, but it does not convert DR4 into FR4 or establish a working link to an unknown peer optic. Record the host policy and software separately from connector, wavelength, FEC and link-budget details. Quantity rollout should follow a sample test in the intended topology.
- Host and line-card model
- Network OS and release
- Port mode and FEC
- Optical scheme and peer optic
- Connector, fiber type, route and loss
- DOM, labeling and document requirements
Application planning
400G QSFP-DD deployment paths
The correct optical family follows the route and network role.
Data-center leaf-spine
Short, repeatable links where port policy and structured fiber must stay consistent.
Cloud switch migration
Upgrades that may retain or replace an existing MPO or duplex plant.
Enterprise core
Facility and campus links where duplex fiber and loss margin guide selection.
DCI edge
Longer direct-detect routes that require a documented budget and clear coherent boundary.
Supply coordination
A six-step 400G QSFP-DD review
The process keeps technical acceptance tied to the quoted item.
1. Define the endpoints
Capture both platforms, ports and software releases.
2. Classify the route
Record distance, fiber, connectors, panels and estimated loss.
3. Select the PMD
Choose the scheme and FEC expected by both ends.
4. Resolve coding
Specify OEM target, monitoring and labeling needs.
5. Approve a sample
Test the exact SKU in the frozen host configuration.
6. Confirm the offer
Set quantity, destination, schedule, documents and warranty terms.
Buyer validation
Replace broad assurances with an item-level approval pack
Available evidence is confirmed for the selected SKU and should be paired with the buyer's own host result.
Exact SKU and PMD
Available specification and mechanical data
Coding-target and DOM review
Link-budget inputs for the installed route
Buyer-approved sample record
Written warranty and RMA terms
Technical resources
Continue the engineering review
Use the relevant guide to resolve a specific decision; product-specific evidence is confirmed for the quoted SKU.
Buyer questions
Frequently asked questions about 400G QSFP-DD Transceivers
How do I choose between 400G QSFP-DD DR4 and FR4?
Start with the fiber plant and peer optic. DR4 is a parallel single-mode architecture, while FR4 uses multiplexed wavelengths over duplex single-mode fiber. Connector, fiber count, lane mapping and breakout options differ. Then compare route loss, FEC, host support and operating practice. The right answer is the one that fits the complete link with acceptable margin.
Can a 400G QSFP112 product appear in this QSFP-DD collection?
Only if the structured product record explicitly identifies QSFP-DD; a text mention of QSFP or 400G is not enough. QSFP112 and QSFP-DD can have different host electrical expectations. The collection filter must exclude conflicting form factors, and a buyer should follow the exact cage and interface named by the platform documentation.
When is a link budget required for a 400G optic?
Use a link budget whenever the route includes multiple connectors, cassettes, splices, uncertain plant condition or a longer-reach optic. Add the transmitter minimum, receiver limits, measured or estimated path loss and a practical operating margin. Nominal distance alone cannot show whether the installed route is safe, especially for LR4 or extended-reach candidates.
Does a 400G QSFP-DD compatible module need sample validation?
Yes for a new host, software release, coding target or significant deployment. Confirm recognition, diagnostics, traffic stability, FEC counters, temperature behavior and the actual peer link. Record the exact SKU, serials, host software and port settings so the result can support later deliveries rather than remaining an informal one-time test.
What belongs in a commercial 400G QSFP-DD request?
Provide the exact host and remote endpoint, software, port mode, FEC, optical scheme, connector, fiber type, route length or loss, quantity, delivery address and required schedule. Include any OEM part number, coding target, genuine-brand-only rule, sample criteria, warranty expectation, labeling or document requirement before the offer is prepared.
Procurement guide
Plan the 400G link before selecting the catalog item
Separate host and optical decisions
First prove the QSFP-DD cage, software policy and port mode. Then identify the optical PMD, connector, route and peer optic. Combining these as one compatibility claim hides the most common failure points.
Use the installed plant as a design input
Document multimode or single-mode fiber, connector count, panels, polarity and route loss. DR4, FR4 and LR4 are not pricing tiers; they represent different physical paths and operating constraints.
Keep coherent transport outside the direct-detect shortlist
A QSFP-DD shell does not make coherent and direct-detect optics interchangeable. If the project calls for 400ZR or OpenZR+, route it to a separate transport review with the necessary line-system and host requirements.
Freeze an acceptance baseline
Test the exact SKU in the intended host and peer topology, document configuration and counters, and retain the result. Only then compare quantity price, delivery, documents, labeling and warranty on like-for-like candidates.
Structured B2B request
Request a 400G QSFP-DD link and BOM review
Send the two endpoints and fiber route so the shortlist can be limited to the correct direct-detect scheme and exact SKU.
No live-stock, lead-time or compatibility commitment is inferred from this page. The selected SKU and commercial terms are confirmed in the written offer.