• Silver-colored arista qdd-400g-lr4 sfp+ transceiver modules with blue handles and metallic connectors for 400g qsfp-dd use
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Arista

Arista QDD-400G-LR4 | 400G QSFP-DD Transceiver, LR4, 10km, Duplex SMF, LC

Arista QDD-400G-LR4 | 400G QSFP-DD Transceiver, LR4, 10km, Duplex SMF, LC

QDD-400G-LR4

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Description

The Arista QDD-400G-LR4 is a 400GBASE-LR4 QSFP-DD optical transceiver delivering 400Gbps connectivity over duplex single-mode fibre at distances up to 10km via a duplex LC connector. Built on 4-channel CWDM PAM4 technology across wavelengths of 1271, 1291, 1311, and 1331nm, it converts 8x50G PAM4 electrical lanes into 4x100G PAM4 optical channels — making it the ideal solution for high-density data centre spine-leaf interconnects, HPC fabrics, and long-reach switch-to-switch links.

Compliant with IEEE 802.3cu 400GBASE-LR4 and IEEE 802.3bs 400GAUI-8 standards, the QDD-400G-LR4 supports Digital Diagnostic Monitoring (DDM/DOM) for real-time visibility into optical performance. The hot-pluggable QSFP-DD MSA form factor ensures seamless integration into Arista 400G platforms. RoHS compliant and designed for enterprise-grade reliability. Get it now at iptrading.com.au — authentic hardware, reliable service.

Features

- 4-channel CWDM MUX/DEMUX design enables 400G optical transmission over duplex SMF
- 8x50G PAM4 electrical input converted to 4x100G PAM4 optical output for maximum density
- Hot-pluggable QSFP-DD form factor fully compliant with QSFP-DD MSA specifications
- Digital Diagnostic Monitoring (DDM/DOM) provides real-time visibility into temperature, voltage, TX/RX power
- Compliant with IEEE 802.3cu 400GBASE-LR4 and IEEE 802.3bs 400GAUI-8 standards
- Supports long-reach switch-to-switch 400G connectivity at up to 10km
- Optical interoperability with 4x100GBASE-LR links up to 10km
- Designed for data centre spine-leaf and high-performance computing (HPC) interconnects
- RoHS compliant lead-free construction for environmental compliance

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

- Part Number: QDD-400G-LR4
- Form Factor: QSFP-DD (Quad Small Form Factor Pluggable – Double Density)
- Data Rate: 400Gbps (400GBASE-LR4)
- Modulation: PAM4 (4-level Pulse Amplitude Modulation)
- Electrical Interface: 8 x 50Gb/s PAM4 lanes (76-pin edge connector)
- Optical Interface: 4 x 100G PAM4 channels, Duplex LC connector
- CWDM Wavelengths: 1271nm, 1291nm, 1311nm, 1331nm
- Maximum Reach: Up to 10km
- Fibre Type: Duplex Single-Mode Fibre (SMF)
- Standards: IEEE 802.3cu 400GBASE-LR4, IEEE 802.3bs 400GAUI-8, QSFP-DD MSA
- Digital Diagnostic Monitoring (DDM/DOM): Supported
- RoHS Compliant: Yes (lead-free)

FAQs

Q: What fibre type and connector does the Arista QDD-400G-LR4 require?
A: The QDD-400G-LR4 requires duplex single-mode fibre (SMF) and uses a standard duplex LC connector. It is not compatible with multimode fibre.

Q: What is the maximum transmission distance of the QDD-400G-LR4?
A: The QDD-400G-LR4 supports transmission distances of up to 10km over duplex single-mode fibre, making it suitable for long-reach data centre and campus interconnects.

Q: Which Arista platforms is the QDD-400G-LR4 compatible with?
A: The QDD-400G-LR4 is designed for Arista switches with QSFP-DD ports that support 400GBASE-LR4, including the Arista 7800 and 7300 series platforms. Always verify compatibility with your specific switch model via Arista's transceiver compatibility matrix.

Q: Does the QDD-400G-LR4 support Digital Diagnostic Monitoring?
A: Yes, the QDD-400G-LR4 supports Digital Diagnostic Monitoring (DDM/DOM), allowing network administrators to monitor real-time metrics including optical transmit/receive power, temperature, and supply voltage directly from the switch.

Q: Can the QDD-400G-LR4 interoperate with 100G LR transceivers?
A: Yes, the QDD-400G-LR4 supports optical interoperability with 4x100GBASE-LR links up to 10km, providing flexibility for breakout connectivity in mixed-speed environments.

Q: Can I purchase the Arista QDD-400G-LR4 in Australia through IP Trading?
A: Yes, the Arista QDD-400G-LR4 is available through iptrading.com.au. IP Trading is an Australian B2B IT hardware specialist supplying authentic Arista transceivers with reliable local service and support.

Datasheet

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