Mellanox LinkX 400G QSFP-DD DR4 Single-Mode Optical Transceiver

The Mellanox LinkX 400G QSFP-DD DR4 transceiver is a pluggable optical module engineered for 400 Gigabit Ethernet deployments requiring reach beyond short-range interconnects. Operating at 53.5 Gbps per lane across four wavelength-division-multiplexed channels, the DR4 variant achieves 400Gbps aggregate throughput over single-mode fiber at distances up to 500 meters, delivering the extended-reach capability essential for campus and metropolitan fabric topologies where data center interconnect (DCI) scaling demands optical transport over greater distances than short-reach SR4 technology permits.

The QSFP-DD (Quad Small Form Factor Pluggable Double Density) form factor consolidates four independent optical pathways into a single 36-pin connector, reducing physical footprint while maintaining backward compatibility through dual-density pinouts that accommodate legacy QSFP28 modules on compatible hardware. The DR4 implementation leverages coherent or pseudo-coherent modulation techniques to maximize spectral efficiency and maintain signal integrity across extended single-mode fiber plant, supporting both new fiber deployments and integration with existing campus backbone infrastructure.

Launched in Q1 2021, this transceiver addresses accelerating 400GbE adoption where architectural migration from 100G and 200G fabrics outpaces transceiver supply, positioning DR4 modules as critical procurement for scaling enterprise data center interconnect strategies. Mellanox LinkX optimization ensures thermal stability, power efficiency, and interoperability across 400G-capable switching platforms from major brands.

Ideal for

• Data center campus interconnect linking multiple facilities 200–500 meters apart without requiring external optical amplification or regeneration equipment
• High-frequency trading and financial services networks requiring ultra-low-latency 400G DCI with deterministic latency profiles across metropolitan areas
• Hyperscale cloud infrastructure fabric expansion where rapid deployment of 400GbE spine-to-leaf architectures demands extended-reach transceiver supply
• Scientific research and HPC clusters requiring 400G east-west traffic aggregation across geographically distributed compute and storage silos
• Media and entertainment content distribution networks delivering 4K/8K broadcast feeds and real-time collaborative production workflows over dedicated optical backbone
• Enterprise service provider networks consolidating customer traffic through 400G fabric nodes positioned at strategic geographic points

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.