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NVIDIA Mellanox LinkX Optical Transceivers
Table of Contents
NVIDIA Mellanox LinkX Optical Transceivers — 25G to 800G#
NVIDIA LinkX® optical transceivers are designed to meet the strict requirements of high-performance computing, enterprise storage, and hyperscale environments. Using original transceivers ensures optimal signal integrity, lowest bit error rates (BER), and full compatibility with ConnectX adapters and Quantum switches.
Optical Transceiver Catalog#
Below is the list of active optical transceiver models available in our inventory.
NVIDIA Mellanox 25G SFP28 SR Optical Transceiver
NVIDIA Mellanox 100G QSFP28 SR4 Optical Transceiver
NVIDIA 400G OSFP NDR Optical Transceiver
| Part Number | Speed | Interface | Connector | Wavelength | Fiber Type | Max Distance | Description |
|---|---|---|---|---|---|---|---|
| MMA2P00-AS | 25G | SFP28 | LC Duplex | 850nm | Multimode (MMF) | 150m (OM4) / 100m (OM3) | 25GbE SR Module |
| MMA1B00-C100-TG | 100G | QSFP28 | MPO-12 | 850nm | Multimode (MMF) | 100m (OM4) / 70m (OM3) | 100GbE SR4 Module, DDMI |
| MMA4Z00-NS400 | 400G | OSFP | MPO-12 APC | 850nm | Multimode (MMF) | 50m (OM4) | NDR IB/ETH SR Module, Flat Top |
| MMA4Z00-NS | 800G | OSFP | 2xMPO-12 APC | 850nm | Multimode (MMF) | 50m (OM4) | 2xNDR Twin-Port SR Module, Finned |
Distance & Cabling Reference Guide#
1. SR vs SR4 vs NDR (Multimode Solutions)#
- 25G SR (SFP28): Utilizes a standard LC-LC duplex multimode patch cable. Uses a single lane for transmission and reception.
- 100G SR4 (QSFP28): Uses a 12-fiber MPO (MPO-12) ribbon patch cable (typically Type-B polarity) to transmit across 4 parallel lanes of 25G.
- 400G/800G NDR (OSFP): Employs PAM4 modulation to transmit ultra-high bandwidth over MPO-12 APC (angled physical contact) connectors. The angled end-face minimizes back reflections, which is critical at higher speeds.
2. Singlemode (LR4/FR4) vs Multimode (SR/SR4)#
- Multimode (MMF): Suited for intra-rack or short-distance inter-rack cabling (up to 100–150m). Lower transceiver cost.
- Singlemode (SMF): Required for distances beyond 150m (up to 10km for LR4). Uses duplex LC connectors on 9/125µm fiber.
Technical Advisory: OEM vs Third-Party Modules#
When purchasing transceivers, customers often ask: “Can I use generic or programmed third-party transceivers?”
Why We Recommend Original NVIDIA LinkX:#
- Firmware Compatibility: NVIDIA ConnectX NICs and Quantum switches run specialized operating systems (like MLNX-OS or Onyx). System updates can frequently lock out or flag generic coded modules, causing port status down.
- Diagnostic Reliability (DDM/DOM): Original modules report exact temperature, voltage, TX power, and RX power values directly to system controllers (iDRAC, HPE iLO, or MLNX-OS). Correct measurements prevent false-positive thermal alerts.
- Advanced Features Support: LinkX modules are certified to support critical features like Forward Error Correction (FEC) settings out of the box, preventing packet drops in high-throughput database workloads.
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