• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista QDD-400G-LR4-Arista | 400G QSFP-DD Transceiver, Single-Mode, 10km, LC

QDD-400G-LR4-Arista

Stock Status: Enquire

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Description

The Arista QDD-400G-LR4 is a 400GBASE-LR4 QSFP-DD optical transceiver designed for high-performance data center and enterprise network applications requiring long-reach connectivity. It delivers 400 Gbps throughput over single-mode fiber up to 10km using CWDM4 wavelengths (1271/1291/1311/1331 nm) with a duplex LC connector. This hot-swappable module supports Digital Optical Monitoring (DOM) for real-time performance tracking and is compliant with IEEE 802.3bs and QSFP-DD MSA standards.

Features

400GBASE-LR4 compliant for long-reach data center interconnects
- Four-channel CWDM4 wavelength multiplexing for efficient fiber utilization
- PAM4 modulation technology for high spectral efficiency
- Digital Optical Monitoring (DOM) for real-time diagnostics and performance monitoring
- Hot-swappable operation for easy installation and maintenance without network downtime
- Low power consumption (<10W) suitable for high-density deployments
- IEEE 802.3bs and QSFP-DD MSA compliance for industry-standard interoperability
- Integrated FEC (Forward Error Correction) for enhanced signal integrity
- MUX/DEMUX optical design converting 8x50G electrical to 4x100G optical channels
- RoHS compliant and meets product safety standards
- Compatible with QSFP-DD switch ports and data center infrastructure

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

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

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Technical Specifications

FAQs

Technical Specifications

Form Factor: QSFP-DD (Quad Small Form-Factor Pluggable Double Density)
- Data Rate: 400 Gbps
- Wavelengths: 1271 nm, 1291 nm, 1311 nm, 1331 nm (CWDM4)
- Maximum Transmission Distance: 10 km over single-mode fiber (SMF)
- Optical Connector: Duplex LC
- Electrical Interface: 8 x 50 Gbps PAM4 lanes (76-pin connector)
- Modulation: PAM4 (4-level Pulse Amplitude Modulation)
- Digital Diagnostics Monitoring: Yes (DOM/DDM support for temperature, voltage, bias current, optical power)
- Power Supply: Single +3.3V
- Power Consumption: <10W typical
- Operating Temperature: 0°C to 70°C (commercial)
- Standards Compliance: IEEE 802.3bs, QSFP-DD MSA, ITU-T G.694.2
- Hot Swappable: Yes

FAQs

Q: What is the maximum transmission distance for the QDD-400G-LR4?
A: The QDD-400G-LR4 supports transmission distances up to 10 km over single-mode fiber. Actual reach depends on optical link budget, fiber quality, and connector loss.

Q: Is this transceiver compatible with other vendors' equipment?
A: Yes, while coded for Arista platforms, the QDD-400G-LR4 follows IEEE 802.3bs and QSFP-DD MSA standards, enabling optical interoperability with other vendors' 400GBASE-LR4 implementations over the fiber link.

Q: What type of fiber cable is required for this module?
A: This transceiver requires single-mode fiber (SMF) with duplex LC connectors to minimize optical dispersion and achieve the specified 10 km reach.

Q: Does the QDD-400G-LR4 support breakout configurations?
A: The QDD-400G-LR4 is designed for native 400G point-to-point links over a single fiber pair. For breakout applications, consider alternative modules like the 400G-SR8 or purpose-built breakout optics.

Q: What monitoring capabilities does this transceiver provide?
A: The module supports Digital Optical Monitoring (DOM/DDM), providing real-time access to temperature, supply voltage, transmit bias current, and optical transmit/receive power levels for proactive network management.

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