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

Arista QDD-400G-XDR4-S | 400G QSFP-DD Transceiver, Single-Mode, 2km, 1310nm

QDD-400G-XDR4-S

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Description

The Arista QDD-400G-XDR4-S is a 400G QSFP-DD optical transceiver designed for high-speed data center and enterprise network applications. It supports 400GBASE-XDR4 transmission up to 2km over single-mode fiber using four parallel 100G optical lanes at 1310nm wavelength with an MPO-12 connector. This module is ideal for interconnecting 400G leaf and spine switches or supporting breakout configurations to 100G links, delivering reliable performance for modern network infrastructures.

Features

400GBASE-XDR4 compliant with IEEE 802.3bs and 802.3cu standards
- PAM4 modulation technology for efficient high-speed data transmission
- Integrated DSP-based gearbox converts 8x 50Gb/s electrical lanes to 4x 100Gb/s optical lanes
- Forward Error Correction (FEC) support for enhanced signal integrity
- Hot-pluggable QSFP-DD MSA-compliant module for easy installation and replacement
- Digital diagnostics monitoring (DDM) for real-time performance tracking
- Low power consumption with single +3.3V power supply
- RoHS compliant and meets CE safety standards
- Supports flexible breakout to 4x 100G DR1 or 2x 200G DR2 configurations
- Ideal for data center leaf-spine architectures and high-speed server connectivity
- Compatible with Arista network equipment through factory-programmed EEPROM
- EML laser technology at 1310nm wavelength for reliable long-distance transmission

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 aggregate (4 x 100 Gbps optical lanes)
- Electrical Interface: 8 x 50Gb/s PAM4 (400GAUI-8 compliant)
- Optical Interface: 4 x 100Gb/s PAM4 at 1310nm wavelength
- Connector Type: MPO-12 (MTP/MPO-12)
- Fiber Type: Single-Mode Fiber (SMF)
- Maximum Distance: Up to 2km
- Transmitter: EML (Electroabsorption Modulated Laser) at 1310nm
- Receiver: PIN Photodiode array
- Digital Diagnostics: DOM/DDM support (temperature, voltage, optical power monitoring)
- Power Supply: Single +3.3V
- Operating Temperature: 0°C to 70°C (commercial grade)
- Standards Compliance: IEEE 802.3bs, IEEE 802.3cu, QSFP-DD MSA, 400GAUI-8
- Breakout Support: Supports 4x 100G or 2x 200G breakout configurations

FAQs

Q: What is the maximum transmission distance for the QDD-400G-XDR4-S?
A: The QDD-400G-XDR4-S supports transmission distances up to 2km over single-mode fiber (SMF) using an MPO-12 connector with a minimum optical budget of 4 dB.

Q: Can this transceiver be used in breakout mode?
A: Yes, the QDD-400G-XDR4-S supports breakout configurations including 4x 100G or 2x 200G, making it suitable for connecting 400G switches to lower-speed 100G QSFP28 switches or network interface cards.

Q: Is this module compatible with other QSFP form factors?
A: QSFP-DD ports can accept QSFP56 and QSFP28 modules, but QSFP-DD modules like the QDD-400G-XDR4-S cannot be used in QSFP56 or QSFP28 ports due to the larger form factor.

Q: What type of fiber cable is required?
A: The module requires single-mode fiber (SMF) with an MPO-12 or MTP-12 connector. For breakout applications, an MPO to LC fanout cable can be used to connect to 100G FR modules.

Q: Does this transceiver support digital diagnostics monitoring?
A: Yes, the QDD-400G-XDR4-S includes DOM/DDM functionality providing real-time monitoring of optical output power, receive power, temperature, transmit bias current, and supply voltage for enhanced network management.

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