• 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-FR4-Arista | 400GBASE-FR4 Transceiver, 400G QSFP-DD, 1310nm, 2km SMF

QDD-400G-FR4-Arista

Stock Status: Enquire

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Description

The Arista QDD-400G-FR4 is a high-performance 400GBASE-FR4 transceiver designed for 2km optical communication over single-mode fiber. This QSFP-DD module converts 8 channels of 50Gb/s PAM4 electrical signals into 4 CWDM optical wavelengths (1271/1291/1311/1331nm), multiplexed into a single 400G signal via a duplex LC connector. Ideal for data center interconnects and high-bandwidth applications requiring extended reach, it complies with IEEE 802.3bs and QSFP-DD MSA standards.

Features

400GBASE-FR4 compliant with IEEE 802.3bs standard
- QSFP-DD MSA form factor for high-density deployment
- PAM4 modulation technology for efficient high-speed transmission
- 4-channel CWDM wavelength multiplexing (1271/1291/1311/1331nm)
- EML laser transmitter with quad-channel driver
- Quad-channel photodiode array receiver with optical demultiplexer
- Integrated DSP-based gearbox for 8x50G to 4x100G conversion
- Forward Error Correction (FEC) support per IEEE 802.3bs
- Digital Diagnostics Monitoring (DDM/DOM) for real-time performance data
- Hot-pluggable module for easy deployment and maintenance
- Low power consumption (≤12W typical)
- Single duplex LC/UPC connector for simplified cabling
- 2-wire serial interface for management (I2C compatible)
- RoHS compliant and meets international safety standards
- Operating temperature range: 0°C to 70°C (commercial grade)

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: 400Gbps (400GBASE-FR4)
- Wavelength: 4x CWDM (1271nm, 1291nm, 1311nm, 1331nm)
- Reach: Up to 2km over single-mode fiber (SMF)
- Connector: Duplex LC/UPC
- Electrical Interface: 8x 50Gb/s PAM4 (76-pin connector)
- Optical Interface: 4x 100Gb/s per wavelength, multiplexed
- Modulation: PAM4 (Pulse Amplitude Modulation 4-level)
- Power Consumption: ≤12W typical
- Power Supply: Single +3.3V
- Operating Temperature: 0°C to 70°C (commercial)
- Digital Diagnostics Monitoring (DDM/DOM): Supported
- Standards Compliance: IEEE 802.3bs, QSFP-DD MSA, 100G Lambda MSA, 400GAUI-8/CEI-56G-VSR-PAM4
- Optical Budget: Minimum 4dB

FAQs

Q: What is the maximum transmission distance for the QDD-400G-FR4?
A: The QDD-400G-FR4 supports transmission distances up to 2km over single-mode fiber (SMF) with a duplex LC connector, making it suitable for intra-data center and short campus interconnects.

Q: Is this transceiver compatible with Arista switches?
A: Yes, the QDD-400G-FR4 is designed for compatibility with Arista QSFP-DD ports and is pre-programmed with the necessary configuration data for seamless integration with Arista networking equipment supporting 400G interfaces.

Q: Can the QDD-400G-FR4 be used in breakout configurations?
A: No, the 400GBASE-FR4 uses WDM technology to multiplex four 100G wavelengths onto a single duplex fiber pair and is designed for point-to-point 400G links. For breakout applications, consider 400G-DR4, 400G-XDR4, or 400G-PLR4 transceivers instead.

Q: What are the key differences between FR4 and DR4 transceivers?
A: The FR4 uses CWDM wavelengths (1271/1291/1311/1331nm) multiplexed onto a single duplex fiber pair with a duplex LC connector and reaches 2km. The DR4 uses parallel single-mode fiber with an MPO-12 connector (4 fiber pairs) and reaches 500m. FR4 is more fiber-efficient for longer reaches.

Q: Does this module support Digital Diagnostics Monitoring?
A: Yes, the QDD-400G-FR4 includes DDM/DOM support, providing real-time monitoring of optical output power, receive optical power, module temperature, transmit bias current, and supply voltage for proactive network management.

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