• Silver-colored arista qdd-400g-xdr4-s sfp+ transceiver modules with blue handles and metallic connectors for 400g qsfp-dd use
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Arista

Arista QDD-400G-XDR4-S | 400G QSFP-DD Transceiver, XDR4, 4x100G-FR, SN, 2km SMF

Arista QDD-400G-XDR4-S | 400G QSFP-DD Transceiver, XDR4, 4x100G-FR, SN, 2km SMF

QDD-400G-XDR4-S

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Description

The Arista QDD-400G-XDR4-S is a 400GBASE-XDR4 QSFP-DD optical transceiver designed for high-density data centre interconnect and 400G-to-100G migration deployments. Operating across four parallel 100GBASE-FR lanes at 1310nm over single-mode fibre, it delivers 400Gbps aggregate throughput with reach up to 2km — making it ideal for leaf-to-spine links and campus-scale DCI applications. SN optical connectors provide the compact, high-density cabling interface required in modern 400G deployments, while PAM4 modulation and an 8x 50Gb/s DSP gearbox ensure reliable, efficient signal integrity.

Breakout support for 4x 100G-FR QSFP modules enables seamless interoperability with existing 100G infrastructure, protecting investment during network upgrades. Digital Diagnostic Monitoring (DDM) provides real-time visibility into transceiver health, simplifying operations and fault identification. Compliant with IEEE 802.3bs and QSFP-DD MSA standards, the QDD-400G-XDR4-S is RoHS certified and operates across commercial temperature ranges. Buy today from iptrading.com.au — fast shipping and expert service across Australia.

Features

- 4x 100GBASE-FR breakout interoperability with existing 100G-FR QSFP infrastructure
- SN optical connectors enable high-density cabling in space-constrained data centre environments
- Parallel SMF transmission supports link lengths up to 2km for leaf-to-spine and DCI use cases
- PAM4 modulation with 8x 50Gb/s DSP gearbox converting to 4x 100Gb/s optical channels
- Supports 400G-to-100G network migration without forklift upgrades
- Digital Diagnostic Monitoring (DDM) for real-time transceiver health, temperature, and power visibility
- Compliant with IEEE 802.3bs and QSFP-DD MSA standards for broad interoperability
- RoHS compliant for environmental regulatory requirements

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Form Factor: QSFP-DD
- Aggregate Data Rate: 400 Gbps
- Optical Standard: 400GBASE-XDR4 (4x 100GBASE-FR)
- Wavelength: 1310nm (4-lane parallel)
- Electrical Interface: 8x 50 Gb/s PAM4 (400GAUI-8)
- Optical Interface: 4x 100 Gb/s parallel lanes
- Modulation: PAM4
- Connector Type: SN optical connectors
- Fibre Type: Parallel Single-Mode Fibre (SMF)
- Maximum Reach: Up to 2km
- Breakout Support: 4x 100G-FR QSFP
- Digital Diagnostic Monitoring (DDM/DOM): Supported
- Operating Temperature: 0°C to 70°C (commercial)
- Compliance: IEEE 802.3bs, QSFP-DD MSA, RoHS

FAQs

Q: What fibre type does the QDD-400G-XDR4-S require?
A: The QDD-400G-XDR4-S requires parallel single-mode fibre (SMF). It uses four parallel 100G lanes at 1310nm and is not compatible with multimode fibre. SN optical connectors are used at the transceiver interface.

Q: Can I use this transceiver to break out 400G into four 100G connections?
A: Yes. The QDD-400G-XDR4-S supports breakout to 4x 100G-FR QSFP modules, making it ideal for 400G-to-100G migration scenarios. Each of the four parallel optical lanes operates at 100GBASE-FR independently when broken out.

Q: What is the maximum reach of the QDD-400G-XDR4-S?
A: This transceiver supports link lengths of up to 2km over parallel single-mode fibre, making it suitable for data centre interconnect (DCI), campus-scale leaf-to-spine links, and longer intra-campus runs.

Q: Which Arista switches and platforms are compatible with this transceiver?
A: The QDD-400G-XDR4-S is designed for use in Arista switches and platforms with QSFP-DD ports supporting 400GBASE-XDR4. It complies with QSFP-DD MSA and IEEE 802.3bs standards. Contact IP Trading for specific platform compatibility confirmation.

Q: Does the QDD-400G-XDR4-S support Digital Diagnostic Monitoring?
A: Yes. The transceiver supports Digital Diagnostic Monitoring (DDM/DOM), enabling real-time visibility into key parameters including optical transmit/receive power, temperature, voltage, and bias current — simplifying operations and fault isolation.

Q: Can I purchase the Arista QDD-400G-XDR4-S in Australia from IP Trading?
A: Yes. The Arista QDD-400G-XDR4-S is available through iptrading.com.au with fast shipping and expert support across Australia. IP Trading specialises in B2B IT hardware procurement for enterprise and data centre environments. Contact us for pricing and availability.

Datasheet

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