High-Speed Interconnect

400G Optical Transceivers

Choose a 400G optical requirement by host interface and fiber route before comparing sourcing options. SkyTrade helps international buyers distinguish short-reach data center optics from coherent inter-site transmission.

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Reference families by interface and reach

Reference families by interface and reach
Reference family	Fiber / reach	Connector
QSFP112 DR4	SMF / 500 m	MPO-12
QSFP112 FR4	SMF / 2 km	Duplex LC
QSFP-DD FR4	SMF / 2 km	Duplex LC
OSFP VR4	MMF / 30 m OM3 or 50 m OM4	MPO-12

Examples are drawn from reviewed reference specifications. This is not an exhaustive catalog or a statement that the variants are currently available.

Configuration options to discuss

QSFP-DD, QSFP112 and OSFP are separate form-factor requirements in the reviewed families. Start with the switch or adapter’s accepted module type. Then compare the required reach, fiber and connector. For DCI or metro transport, evaluate the separate 400G ZR / ZR+ sourcing page.

Applications

Data center switching and server-network link procurement.
AI infrastructure links where the selected 400G host and optical module are documented to work together.

Sourcing and configuration considerations

List installed fiber type and route length; do not select solely by the 400G designation.
Include exact switch/NIC platform, Ethernet or InfiniBand requirement and port mode.
Compare both ends of the link, module documentation and any testing requirements in one RFQ.

Why source through SkyTrade

We help organize competing quotations around a consistent technical requirement, with China-side supplier communication and procurement coordination where a suitable option is identified.

Frequently asked questions

Are QSFP-DD and QSFP112 interchangeable?

Do not assume they are. Confirm the host’s accepted form factor, electrical interface and supported module requirements before ordering.

Should a long-distance DCI request use this page?

Use the 400G ZR / ZR+ page for coherent DCI requirements and include the optical line-system details.

What to include in your RFQ

Form factor and exact host platform
Data rate and required protocol
Reach, fiber type and connector
Far-end module or endpoint
Quantity and destination country

Continue to our existing enquiry form. You can edit the product context before submitting. Send drawings or a BOM separately by email as described in the form.