Product
400G to 100G QSFP-DD to QSFP28 Breakout Direct Attach Copper Cable 1m
400G QSFP-DD TO 4X100G QSFP28 1m- Model reference
- 4QDD-DAC-BO-1M
- Data rate
- 400G ~100G
- Reach
- 1M
- Form factor
- QSFP-DD ~ QSFP28
Key specifications
Original part-number references
These references compare optical specifications. Confirm the host device, firmware and coding profile before deployment.
| Brand | Original part number | Model reference | Optical specification reference | Next step |
|---|---|---|---|---|
| ARISTA | H-D400-4Q100-1M | 4QDD-DAC-BO-1M | 400G QSFP-DD to 4 x 100G QSFP28 twinax active direct-attach copper breakout cable, 1 m. Arista Transceiver and Cable GuideReviewed 2026-08-17 | Specification matchCheck host compatibility |
Compatibility matching
Compatible with a wide range of major network brands.
Send the host device brand, model and link requirements so we can match an appropriate option.Applications
Review where this product fits the link design.
Confirm the host port, fibre or cable path, distance and operating environment before selecting the final variant.
- Endpoint fitHost device, port role and remote-end interface
- Link fitRate, reach, wavelength, fibre and connector
- Project fitEnvironment, quantity and document requirements
Testing evidence
Request evidence against the exact product scope.
Available evidence depends on the model and agreed review scope. Ask for the checks needed by engineering or procurement before approving a sample or rollout.
- Product identityModel, label, connector and wavelength details
- Host contextCoding or recognition evidence where applicable
- Output evidenceOptical, diagnostic or link information where available
Product datasheets
Review the document for the exact model.
Review the document for the exact model and reach before approving a sample or rollout.
Download 4QDD-DAC-BO-1M specification (PDF)Related questions
Five answers for this product path.
Product selectionHow can I identify the correct form factor?
Check the device manual and the marking on the existing module or cable. SFP, SFP+, SFP28, QSFP+, QSFP28, QSFP-DD and OSFP are not interchangeable merely because their connectors look similar.
Browse productsCompatibility & codingWhat information is required for a compatibility review?
Provide the equipment manufacturer, exact device model, firmware or network OS, port role, requested data rate and any OEM module reference. These details allow a model-specific review instead of a brand-level assumption.
Start a model reviewOptical link designWhat must be checked for a breakout link?
Confirm that the host port supports the intended breakout mode, lane count and speed. Match the parent module, fan-out cable or optics, remote ports, FEC and software configuration.
Use the selection guideHigh-speed deploymentHow should I compare QSFP-DD and OSFP for 400G?
Start with the host port and supported interface list. The form factors have different mechanical and thermal characteristics and should not be treated as direct substitutes without device support.
Plan a technical reviewDocuments & procurementHow do I make sure a document applies to my exact model?
Compare the model reference, interface, reach and variant with your product shortlist. If the document is not published or the revision is unclear, send the model and required document type through the document request form before using it for approval.
Request a document pack