NVIDIA/Mellanox MMS4X00-NS400 Compatible 400G OSFP DR4 Optical Transceiver – 500m, SMF, 1310nm, MPO-12/APC, DOM, Flat Top
The MMS4X00-NS400 OSFP DR4 transceiver is a 400G optical module designed for high-performance InfiniBand NDR deployments. It features a Flat-Top OSFP (OSFP-RHS) form factor and a parallel optical interface using a single MPO-12/APC connector.
This transceiver uses 100G PAM4 modulation across 4 channels and supports up to 500 meters over OS2 single-mode fiber (SMF) at a 1310nm wavelength. Fully qualified for InfiniBand NDR (Next Data Rate) end-to-end networks, it ensures ultra-low latency and scalable bandwidth in dense compute fabrics.

Equipped with Digital Optical Monitoring (DOM) via I²C interface, it provides real-time access to key operating parameters. The module is ideal for deployment in ConnectX-7 adapters, 2×400G twin-port InfiniBand switches, and supercomputing or HPC clusters that require dense, high-speed interconnectivity with full InfiniBand NDR compliance.

Technical Specifications – NVIDIA/Mellanox MMS4X00-NS400 Compatible 400G OSFP DR4 Transceiver
• Compatibility: NVIDIA/Mellanox InfiniBand NDR
• Model: MMS4X00-NS400
• Form Factor: Single-port OSFP (Flat Top)
• Maximum Data Rate: 425Gbps
• Wavelength: 1310nm
• Maximum Cable Distance: Up to 500?m over OS2 SMF
• Connector Type: MPO-12/APC
• Fiber Type (Media): Single-Mode Fiber (SMF)
• Core Size: 9/125µm

Optical & Electrical Performance
• Transmitter Type: DFB (Distributed Feedback Laser)
• Receiver Type: PIN photodiode
• Transmit Power (TX): -2.9 to 4.0dBm
• Receiver Sensitivity: < -5.9dBm
• Receiver Overload: 4.0dBm
• Power Budget: 3dB
• Extinction Ratio: > 3.5dB
• Maximum Power Consumption: = 10W
• Operating Temperature Range: 0°C to 70°C

Functional Features
• Electrical Modulation: 4 × 100G-PAM4
• Optical Modulation: 4 × 100G-PAM4
• CDR (Clock and Data Recovery): Supported
• Inbuilt FEC (Forward Error Correction): Yes
• DOM/DDM (Digital Diagnostics Monitoring): Supported
• Packaging Technology: COB (Chip-on-Board)

Compliance & Protocols
• Protocols & Standards:
o OSFP MSA Rev. 5.0
o IEEE 802.3bs-2017
o IEEE 802.3ck-2022
o CMIS Rev. 4.0
o IEEE 802.3-2022