NVIDIA Mellanox® MMS1V00-WM 400GbE QSFP-DD DR4 Transceiver: This carrier-grade optical transceiver is engineered for 400 Gigabit Ethernet (400GbE) connectivity over parallel Single Mode Fiber (SMF). Compliant with the IEEE 802.3bs 400GBASE-DR4 standard, it features an internal gearbox that converts 8 electrical lanes of 50Gb/s PAM4 into 4 optical lanes of 100Gb/s PAM4. This module allows for 400G point-to-point links or high-density breakout configurations to 4x 100G.
🔧 Technical Specifications
OEM: NVIDIA / Mellanox
P/N: MMS1V00-WM
Form Factor: QSFP-DD (Double Density) Type 2
Interface: 400GBASE-DR4 (MPO-12/APC)
Data Rate: 400GbE (Optical: 4x 100G PAM4 / Electrical: 8x 50G PAM4)
Wavelength: 1310nm
Reach: 500 Meters on SMF
Max Power Consumption: 12W
🌐 Engineering Context: The MMS1V00-WM is the cornerstone of modern Leaf-Spine architectures. Unlike FR4 modules (which use duplex LC cables), the DR4 standard uses parallel fiber (MPO) to enable "Breakout Mode." This allows a single 400G switch port to function as four discrete 100G ports, connecting to 100GBASE-DR1 transceivers (like the MMS1V70-CM). It supports KP4 FEC (Forward Error Correction) to ensure data integrity over the 500m reach.
🧠 Typical Use Cases
400GbE Spine-to-Super-Spine interconnects in Hyperscale Data Centers.
Breakout configurations: 1x 400G QSFP-DD to 4x 100G QSFP28 (DR1) for high-density server aggregation.
Campus backbone links up to 500m using existing Single Mode MPO infrastructure.
High-bandwidth AI training clusters requiring 400G Ethernet fabrics (Spectrum-3/4).
 
✅ Compatible With: NVIDIA Spectrum-3 (SN4000) and Spectrum-4 (SN5000) Series Switches with QSFP-DD ports. Compatible in breakout mode with NVIDIA MMS1V70-CM (100G DR1) transceivers. (Requires QSFP-DD MSA compliant ports capable of 12W power delivery)
❌ NOT Compatible With: Standard QSFP28 ports (physically incompatible); Multi-Mode Fiber (OM3/OM4); Standard "Flat" UPC MPO connectors (Requires Angled/APC); Legacy 40G/100G switches not supporting PAM4 encoding.
 
🛠️ Installation & Optical Requirements
Connector Type - APC: This transceiver uses an MPO-12 APC (Angled Physical Contact) connector, identifiable by the green housing on the cable. Do NOT connect standard flat (UPC/Blue) MPO cables; doing so will shatter the fiber cores and destroy the transceiver lens.
Thermal Design: With a 12W TDP, this module runs hot. Ensure your switch fan policy is set to dynamic/high performance. Do not obstruct airflow in the QSFP-DD cage.
Breakout Cabling: For 4x100G mode, use an MPO-12 APC to 4x LC Single Mode breakout cable (if connecting to DR1/FR1 transceivers) or an MPO-to-MPO trunk depending on the remote end architecture.
 
🤝 Why Choose T.E.S IT-SOLUTIONS? We specialize in enterprise-grade NVIDIA networking solutions. Every unit is strictly validated for 400GbE DR4 performance in our lab. We offer expert consultation, fast worldwide shipping, and a comprehensive warranty to ensure your data center infrastructure runs without compromise.