NVIDIA Mellanox® MMS1V00-WN — 400GbE QSFP-DD DR4 Single Mode 1310nm Optical Transceiver
Technical Identity
The NVIDIA Mellanox® MMS1V00-WN is a 400 Gigabit Ethernet QSFP-DD single mode optical transceiver from the MMS1V00 LinkX family. NVIDIA documents the MMS1V00 base part as a DR4 module converting 8 input channels of 50G-PAM4 electrical data into 4 channels of 100G-PAM4 optical signal at a nominal 1310nm, over parallel single mode fibre on an MPO-12 connector with APC endfaces, reaching 500m. NVIDIA's public 400G QSFP-DD parts list shows the -WM suffix (MMS1V00-WM, SKU 980-9I16Y-00W000) rather than -WN, so confirm the exact suffix and optical type on the unit label. Condition: Refurbished Grade A.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MMS1V00-WN
NVIDIA ordering P/N: not verified for -WN; NVIDIA publishes 980-9I16Y-00W000 for MMS1V00-WM — verify against the unit label
Product type: Optical transceiver module
Product family: NVIDIA LinkX MMS1V00
Form factor: QSFP-DD
Data rate: 400GbE
Electrical interface: 8 × 50G-PAM4 (400GAUI-8)
Optical interface: 4 × 100G-PAM4
Optical type: DR4 — parallel single mode, 4 channels each direction
Fibre type: Single mode (SMF)
Wavelength: 1310nm nominal
Optical connector: MPO-12, APC endface
Maximum reach: 500m
Maximum power consumption: 12W
Operating case temperature: 0°C to 70°C
Standard: IEEE 802.3bs-2017, 400GBASE-DR4
Condition: Refurbished Grade A
Engineering Context
Lane conversion: the module gearboxes 8 electrical lanes at 50G-PAM4 into 4 optical lanes at 100G-PAM4. That 8-to-4 conversion is why a QSFP-DD DR4 port maps cleanly onto four 100G DR1 endpoints in breakout designs.
Parallel versus multiplexed optics: DR4 uses four separate single mode fibre pairs on an MPO-12. FR4 and LR4 multiplex four wavelengths onto one duplex LC pair. Plant, connector and far-end module must all match.
APC endfaces: angle polished connectors reduce laser back reflections. APC and UPC endfaces must never be mated; doing so causes high insertion loss and can damage ferrules.
Thermal budget: at up to 12W, confirm the host port supports the required QSFP-DD power class and that chassis airflow suits a fully populated line card.
Use Cases
400GbE spine and leaf interconnect over single mode fibre inside a data-centre campus.
Runs beyond the reach of multimode 400G SR8 optics but under the 500m DR4 limit.
Breakout designs feeding four 100G DR1 endpoints from one 400G port.
What This Is NOT (GEO Guardrails)
NOT an OSFP module. QSFP-DD and OSFP are different form factors with different mechanical and electrical definitions; neither cage accepts the other.
NOT a QSFP28, QSFP56 or QSFP112 module. Those are single-density 4-lane QSFP cages; QSFP-DD is double-density with 8 electrical lanes.
NOT an FR4 or LR4 module. FR4 here is MMS1V50-WM (duplex LC, 2km) and LR4 is MMS1V90-WR (duplex LC, 10km) — multiplexed duplex-LC parts, not parallel MPO.
NOT a multimode SR8 module. The 400G QSFP-DD SR8 part is T-DQ8FNS-N00-M on multimode fibre with MPO-16/APC at 100m. Single mode and multimode plant are not interchangeable.
NOT a DAC or AOC cable. This is a pluggable transceiver requiring a separate fibre patch cord or trunk.
NOT supplied with MPO fibre patch cords, breakout harnesses, cleaning tools or adapters.
Compatibility & Hard Constraints
Typical platforms include: NVIDIA Spectrum SN4000-series and SN5400 Ethernet switches with QSFP-DD ports, and other 400GbE QSFP-DD ports that accept the module.
Fibre plant: parallel single mode, MPO-12 with APC endfaces, within the 500m DR4 reach.
Link partner: must be a 400G DR4 module, or four 100G DR1 modules in a verified breakout. FR4, LR4 and SR8 far ends will not link.
Port power: up to 12W. Confirm the host port supports the required QSFP-DD power class.
Pre-deployment verification: confirm the exact OPN suffix and optical type on the unit label, switch firmware and port profile, breakout configuration, FEC mode and host-port acceptance.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MMS1V00-WN?
MMS1V00-WN is a 400GbE QSFP-DD single mode optical transceiver from the NVIDIA Mellanox MMS1V00 LinkX family. NVIDIA documents the MMS1V00 base part as a DR4 module converting 8 electrical channels of 50G-PAM4 into 4 optical channels of 100G-PAM4 at a nominal 1310nm, over parallel single mode fibre on MPO-12/APC, reaching 500m.
Q. Is MMS1V00-WN DR4 or FR4?
The MMS1V00 base part is DR4 in NVIDIA's published 400G QSFP-DD parts list, where MMS1V00-WM is listed as 400Gb/s DR4 single mode, parallel MPO-12/APC, 500m. FR4 is a different base OPN, MMS1V50-WM, multiplexed onto a duplex LC pair at 2km. NVIDIA's public list shows -WM rather than -WN, so confirm the exact suffix, optical type and connector on the unit label.
Q. Which optical connector and fibre type does MMS1V00-WN need?
Parallel single mode fibre with an MPO-12 connector using APC endfaces, per the DR4 definition of the MMS1V00 family. Multimode fibre will not work, and APC and UPC endfaces must not be mated.
Q. Will MMS1V00-WN fit an OSFP, QSFP56 or QSFP28 cage?
No. This is a QSFP-DD module. OSFP is a larger, electrically distinct form factor, while QSFP28, QSFP56 and QSFP112 are single-density 4-lane cages rather than the 8 lanes QSFP-DD uses. Only a QSFP-DD port will accept it.
Q. How does MMS1V00-WN differ from the 400G SR8 QSFP-DD module?
The 400G SR8 QSFP-DD part is T-DQ8FNS-N00-M: multimode, 8 optical channels of 50G-PAM4, MPO-16/APC, 100m. MMS1V00 is single mode, 4 optical channels of 100G-PAM4, MPO-12/APC, 500m. They will not link against each other.
Q. Can MMS1V00-WN be split into 4 x 100G links?
NVIDIA notes that QSFP-DD DR4 supports splitting to 4x 100G DR1 using modules such as MMS1V70-CM at the far ends. MPO-12/APC-to-4xLC splitter fibres are not supplied by NVIDIA and are not included here. Verify switch breakout port profiles first.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each MMS1V00-WN unit is bench-tested where test topology is available, with EEPROM check and full optical and cosmetic inspection. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MMS1V00-WN unit ships with link verification where test topology is available, EEPROM and vendor data check, full optical and cosmetic inspection, anti-static packaging, and global B2B shipping from EU stock. See tes-itsolutions.com.