NVIDIA/Mellanox MMA4X00-NS400 Compatible 400G Single-port OSFP RHS/Flat Top DR4 Transceiver Module
The MMA4X00-NS400 compatible module serves equipment requiring a 400G Single-port OSFP RHS/Flat Top interface with 1310nm optics and a 500m rating. Connection is through MPO-12/APC. Product data, application guidance and factory verification are presented together to support project teams keep OEM references, delivery records and port schedules aligned.
OEM Part Number: MMA4X00-NS400HT Part Number: OSFP-DR4-400G-FL
Product Highlights
- Compatible alternative to NVIDIA/Mellanox MMA4X00-NS400
- 400G connectivity at 425Gbps (4x106.25Gbps)
- Optical wavelength: 1310nm
- Specified reach: 500m
- MPO-12/APC / SMF interface
- Factory compatibility verification and optical performance testing before shipment
Specifications
| NVIDIA/Mellanox Ethernet Compatible | MMA4X00-NS400 |
|---|---|
| Manufacturer | HT |
| HT Part Number | OSFP-DR4-400G-FL |
| Form Factor | Single-port OSFP RHS/Flat Top |
| Max. Data Rate | 425Gbps (4x106.25Gbps) |
| Wavelength | 1310nm |
| Max. Cable Distance | 500m |
| Connector | MPO-12/APC |
| Media | SMF |
| Modulation (Electrical) | 4x100G-PAM4 |
| Modulation (Optical) | 4x100G-PAM4 |
| Application | 400G Ethernet |
Project Documentation and Traceability
Large deployments are easier to audit when the order code, optical standard and endpoint record agree. Keep the OEM reference in the compatibility document and the HT part number on the packing list. Labels and carton groups can be arranged by rack or port plan so installers need not identify modules by appearance. For this model, the principal parameters are data rate 425Gbps (4x106.25Gbps), wavelength 1310nm, rated reach 500m.
NVIDIA/Mellanox Compatibility and Factory Testing
Factory verification starts with the expected MMA4X00-NS400 identity and finishes with an operating host link. EEPROM data, diagnostic visibility and the stated optical parameters are assessed together. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Applications and Optical Link Design
Use this module for equipment interconnection over the specified single-mode fiber plant, including enterprise backbone, campus, metro or data-center interconnect links according to its rated distance. Confirm that both ends use the same optical standard and wavelength plan, and allow for connector, splice and patch-panel loss within the stated power budget.
Before deployment, check the host port type, supported data rate and firmware requirements. The 400G interface configuration must match the remote equipment; sharing a Single-port OSFP RHS/Flat Top housing alone does not make two transceiver types interoperable.
Before commissioning, measure the complete single-mode channel against the stated budget for 500m. Inspect every MPO-12/APC connection and record diagnostic power where supported. Both ends must agree on rate, wavelength and optical standard.
Optical Acceptance, Diagnostics and Handling
Use the electrical and optical limits in the specification table as the acceptance reference for this model. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
Frequently Asked Questions
Is this an original NVIDIA/Mellanox transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies MMA4X00-NS400, not an original NVIDIA/Mellanox-branded module.
Which fiber and connector are required?
Use MPO-12/APC with SMF. The specified maximum reach is 500m, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Ordering Information
Use MMA4X00-NS400 as the compatibility cross-reference and OSFP-DR4-400G-FL as the HT ordering identity. Keep other reaches or wavelength directions on separate order lines. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
Quality Assurance and Packaging
Quality control covers the optical or electrical interface, host identification and operating link. The verified unit is then individually protected and cartoned. Customer references, rack groups and project packing lists can be added for volume orders.
