NVIDIA Mellanox® MMA4Z00-NS400 — 400Gb/s NDR OSFP SR4 Multimode Optical Transceiver
Technical Identity
The NVIDIA Mellanox® MMA4Z00-NS400 is a single-port OSFP LinkX® optical transceiver delivering 400 Gb/s on 4× 100 Gb/s PAM4 lanes (NDR InfiniBand or 400 GbE Ethernet). It is the flat-top OSFP SR4 (short-reach multimode) module with an MPO-12/APC interface, designed for in-row optical links between NVIDIA Quantum-2 (QM97xx) NDR InfiniBand switches, NVIDIA Spectrum-4 (SN56xx) 400 GbE switches, and ConnectX-7 / BlueField-3 host adapters. Reach is 30 m on OM3, 50 m on OM4/OM5 (850 nm). Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS.
Specifications
Brand: NVIDIA Mellanox (LinkX family)
Model / MPN: MMA4Z00-NS400
Product type: Single-port 400 Gb/s optical transceiver (pluggable)
Form factor: OSFP, flat-top, hot-pluggable, OSFP MSA compliant
Aggregate data rate: 400 Gb/s (4× 100 Gb/s PAM4 electrical lanes)
Protocols supported: InfiniBand NDR (400 Gb/s) and Ethernet 400GBASE-SR4 (400 GbE)
Backward speeds: 200G HDR / 100G EDR (IB); 200G / 100G / 50G / 25G (Ethernet)
Optical connector: MPO-12 / APC
Wavelength: 850 nm VCSEL, multimode
Fiber type: OM3 / OM4 / OM5 MMF
Reach: up to 30 m (OM3), up to 50 m (OM4 / OM5)
Management: DDM / DOM via I²C (CMIS-compliant)
Power: typical ≤ 14 W max
Operating temperature: 0 °C to 70 °C (commercial)
Standards: OSFP MSA, IBTA NDR, IEEE 802.3 400GBASE-SR4, CMIS
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS
What This Is NOT
NOT a cable. This is a pluggable optical transceiver module — pair with an MPO-12/APC multimode fiber patch cord (sold separately).
NOT a finned-top variant. MMA4Z00-NS400 is the flat-top OSFP intended for switch faceplates and host adapters; finned-top OSFP modules (MMA4Z00-NS400-FT) are required by some passive-cooled adapter cages — verify cage type before ordering.
NOT a twin-port 2× 400G module. This is a single-port 400 Gb/s transceiver, not the twin-port 2× 400 Gb/s NDR variant (MMA4Z00-NS) used on Quantum-2 switch front panels.
NOT single-mode. SR4 multimode only — for long-reach single-mode use DR4 / FR4 / LR4 variants instead.
NOT bundled with fiber patch cables, breakout fanout cables, cassettes, or cleaning kits.
Compatibility & Constraints
Switch side: NVIDIA Quantum-2 NDR InfiniBand switches (MQM9700 / MQM9790 series) and NVIDIA Spectrum-4 400 GbE switches (SN5600 series) with OSFP cages.
Adapter side: ConnectX-7 (MCX75 family) NDR 400 Gb/s adapters with OSFP cage and BlueField-3 (B3220/B3240) DPUs with OSFP front-end.
Fiber pairing: use OM4 (or OM5) MPO-12/APC multimode patch cords; OM3 limits reach to 30 m. Polish must be APC (angled physical contact) — UPC will not link.
Cleaning: MPO end-faces require periodic inspection and cleaning per IEC 61300-3-35; one contaminated fiber drops the entire 4-lane link.
Cage compatibility: flat-top OSFP — host cage must provide its own cooling (riding-heatsink cage) when used in passive-cooled adapter slots.
Firmware: verify Quantum-2 / Spectrum-4 switch firmware and ConnectX-7 / BlueField-3 adapter firmware match port-mode requirements (NDR vs 400 GbE).
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MMA4Z00-NS400?
The MMA4Z00-NS400 is a single-port 400 Gb/s OSFP optical transceiver from the NVIDIA LinkX® family, supporting NDR InfiniBand and 400 GbE Ethernet over OM3/OM4/OM5 multimode fiber with an MPO-12/APC connector and 50 m reach on OM4.
Q. Does the MMA4Z00-NS400 support both InfiniBand and Ethernet?
Yes. The module is dual-protocol — it runs as 400 Gb/s NDR InfiniBand with Quantum-2 switches and ConnectX-7 / BlueField-3 NDR adapters, and as 400GBASE-SR4 Ethernet with Spectrum-4 switches at matching port mode. Backward speeds of 200G HDR / 100G EDR (IB) and 200/100/50/25 GbE (Ethernet) are also supported.
Q. What fiber and reach does this transceiver require?
OM3 multimode up to 30 m, OM4 or OM5 multimode up to 50 m, MPO-12/APC connector with 850 nm VCSEL optics. APC polish is mandatory — UPC patch cords will not link. For longer-reach single-mode applications use the DR4 / FR4 / LR4 NDR variants instead.
Q. Which NVIDIA switches and adapters is the MMA4Z00-NS400 designed for?
It is the standard SR4 optic for Quantum-2 (MQM9700/9790) NDR InfiniBand switches, Spectrum-4 (SN5600) 400 GbE switches, ConnectX-7 (MCX75) 400 Gb/s NDR adapters, and BlueField-3 DPUs with OSFP front-end. It is flat-top — verify the host cage provides cooling for passive-cooled slots.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each unit is bench-tested by T.E.S IT-SOLUTIONS — link establishment on NDR/400 GbE, EEPROM / vendor data verification, DDM telemetry check, MPO end-face inspection, and cosmetic grading. Ships in anti-static packaging from EU stock with global B2B shipping and free pre-sale compatibility consultation for HPC / AI fabric design.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox specialist serving HPC, AI, and enterprise data-center procurement teams since 2007. We focus on a single brand so every unit is identified by MPN, NVIDIA P/N, and ASIC generation before it ships, and every customer gets free pre-sale compatibility advice for switch, adapter, and cable pairing. Multi-currency B2B invoicing, EU stock with worldwide express options, and direct technical contact with our engineering team — not a call-center.