NVIDIA MMA4Z00-NS400

The NVIDIA MMA4Z00-NS400 is a 400Gb/s single-port OSFP SR4 multimode transceiver designed for NVIDIA ConnectX-7 adapters and Quantum-2 / Spectrum-4 switches. It supports both InfiniBand and Ethernet protocols with automatic protocol detection. Utilizing 4 channels of 100G PAM4 modulation, it delivers up to 50 meters reach over OM4 multimode fiber via a single MPO-12/APC connector. The flat-top design integrates with the riding heatsink on ConnectX-7 cages for optimal thermal performance.

Product Overview

The MMA4Z00-NS400 is a key component in NVIDIA's end-to-end 400G InfiniBand and Ethernet ecosystems. It is specifically engineered for use with ConnectX-7 OSFP-based host channel adapters (HCAs) and connects to twin-port OSFP transceivers in NVIDIA Quantum-2 or Spectrum-4 switches. The module features 4 independent transmit and receive channels using 850nm VCSEL technology. When paired with a 1:2 splitter fiber cable (MFP7E20 series), only two channels are activated, automatically reducing the speed to 200Gb/s (NDR200) and lowering power consumption to 5.5W. The transceiver is CMIS 4.0 compliant and supports advanced digital diagnostics monitoring (DDM).

Key Features

• Dual-Protocol Support: Seamlessly operates in both InfiniBand (NDR) and Ethernet (400GbE) environments with automatic protocol detection.
• High-Speed Optics: 4 channels of 100G PAM4 modulation with 850nm VCSEL arrays.
• Extended Reach: 50 meters over OM4 multimode fiber, 30 meters over OM3.
• Intelligent Power Scaling: Automatically reduces power from 8.5W to 5.5W when operating in 200G mode (2-channel mode).
• Flat-Top OSFP Design: Optimized for thermal management with the riding heatsink on ConnectX-7 adapter cages.
• Angled Polish Connector: MPO-12/APC (green shell) minimizes back reflection; not compatible with UPC (aqua) connectors.
• Comprehensive Diagnostics: Supports Tx/Rx power monitoring, bias current, voltage, and temperature via DDM.
• Regulatory Compliance: Class 1 laser safety, RoHS compliant, OSFP MSA and CMIS 4.0 compliant.

Optical & Electrical Technology

The MMA4Z00-NS400 leverages 100G per lane PAM4 modulation technology. The electrical host interface consists of 8 differential pairs (4 Tx, 4 Rx) operating at 53.125 Gbaud. The optical engine uses 850nm VCSELs with integrated driver and TIA arrays. The module includes adaptive Tx input equalization, programmable Rx output amplitude, and pre-/post-cursor tuning for signal integrity optimization. Built-in PRBS generator and checker enable in-system link validation without external test equipment.

Typical Deployments & Use Cases

• Switch-to-HCA 400G Links: Connecting a Quantum-2 or Spectrum-4 switch (using twin-port transceivers) to a ConnectX-7 OSFP adapter via straight MFP7E10 fiber cables.
• 200G Fan-Out Configuration: Using MFP7E20 1:2 splitter cables to connect one twin-port switch transceiver to four ConnectX-7 adapters operating at 200Gb/s each.
• Switch-to-Switch Uplinks: Direct attachment to twin-port transceivers in switches for 400G or 800G aggregation.
• High-Density AI Clusters: Enabling low-latency, high-bandwidth connectivity in GPU-accelerated environments with BlueField-3 DPUs (via QSFP112 adapters).

Note: This OSFP module is not compatible with BlueField-3 DPUs, which require QSFP112 form factor.

Compatibility

• Adapters: NVIDIA ConnectX-7 OSFP-based Host Channel Adapters.
• Switches: NVIDIA Quantum-2 InfiniBand switches (with twin-port OSFP), NVIDIA Spectrum-4 Ethernet switches.
• Fiber Cables: NVIDIA MFP7E10 series (straight, 4-channel MPO/APC to MPO/APC) and MFP7E20 series (1:2 splitter, 4-channel to dual 2-channel MPO/APC).
• Protocols: InfiniBand NDR (400Gb/s) and NDR200 (200Gb/s); Ethernet 400GbE and 200GbE.

Technical Specifications

Note: Specifications are based on NVIDIA documentation. Please confirm before ordering.

Selection Guide: Related Transceivers

Product Advantages

• End-to-End NVIDIA Integrity: Rigorous production testing ensures optimal performance and durability in NVIDIA-based infrastructures.
• Automatic Speed & Power Adaptation: Dynamically switches between 400G and 200G modes based on the connected cable, optimizing energy efficiency.
• Future-Ready Design: CMIS 4.0 compliance and support for advanced diagnostics enable seamless integration into next-gen data centers.
• Simplified Inventory: One transceiver part number works for both InfiniBand and Ethernet deployments.

Service & Support

Hong Kong Starsurge Group provides comprehensive support for your networking infrastructure:

• Technical pre-sales consultation to ensure correct transceiver and cable selection.
• Global shipping with secure packaging and fast delivery options.
• Post-sales support for installation and troubleshooting.
• Warranty and return services subject to terms and conditions.

Frequently Asked Questions

Q: Can the MMA4Z00-NS400 be used in a BlueField-3 DPU?
A: No. BlueField-3 adapters only accept QSFP112 form factor modules. This OSFP module is designed for ConnectX-7 OSFP adapters and switches.

Q: What is the difference between the green and aqua MPO connectors?
A: Green indicates an Angled Polished Connector (APC) used in this transceiver. Aqua indicates Ultra-polished Connector (UPC). They are not compatible due to different polish angles.

Q: How does the transceiver automatically switch to 200G mode?
A: When an MFP7E20 splitter cable is inserted, only two of the four fiber channels are physically present. The transceiver detects this and activates only two lanes, reducing speed and power.

Q: What is the typical power consumption at 400G?
A: Typical power is 8.0W, with a maximum of 8.5W. In 200G mode, typical power drops to 5.5W.

Handling & Installation Precautions

• Always use dust caps on optical ports when not connected. Save the caps for future use.
• Clean both the transceiver receptacle and the fiber connector before insertion. Contamination is a leading cause of link failure.
• Avoid exposure to static discharge. Follow ESD-safe handling procedures.
• Do not mix UPC and APC connectors; verify connector type (green shell = APC).
• Ensure the host device (adapter/switch) supports the OSFP form factor and the required firmware version.

Key Facts at a Glance

Compatibility Matrix

Buyer Checklist

• Confirm your adapter/switch supports OSFP form factor and 400G NDR/Ethernet.
• Select appropriate fiber cables: straight (MFP7E10) for 400G, splitter (MFP7E20) for 200G fan-out.
• Ensure fiber type is multimode OM3 or OM4 with MPO-12/APC connectors.
• Verify case temperature range and airflow in your chassis.
• Check for any firmware requirements on the host device.