NVIDIA Mellanox® MC2210511-LR4 — 40GBASE-LR4 QSFP+ 1310nm 10km SMF Optical Transceiver
Technical Identity
The NVIDIA Mellanox® MC2210511-LR4 is a 40Gb/s QSFP+ optical transceiver for single-mode fiber. It multiplexes four CWDM channels (1271, 1291, 1311 and 1331 nm) onto a duplex LC connection, reaching up to 10 km over OS2 SMF. The module uses CWDM DFB lasers and high-sensitivity PIN receivers and complies with the QSFP+ MSA (SFF-8436) and IEEE 802.3ba 40GBASE-LR4. Condition: Refurbished Grade A. Units currently in T.E.S stock are labeled MC2210511-LR4-F-A2 on the pull tab — a suffix variant of the same base model; buyers requiring an exact suffix match should verify against the unit label before ordering.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MC2210511-LR4 (stock units labeled MC2210511-LR4-F-A2)
NVIDIA P/N: — (verify against unit label / vendor documentation)
Product type: Optical transceiver module
Product family: NVIDIA LinkX QSFP+ transceivers
Form factor: QSFP+ (SFF-8436 MSA)
Standard: IEEE 802.3ba 40GBASE-LR4
Speed: 40Gb/s aggregate (4 × 10Gb/s channels)
Wavelengths: CWDM 1271 / 1291 / 1311 / 1331 nm (1310 nm band)
Optical connector: Duplex LC
Fiber type: Single-mode fiber (SMF, OS2)
Reach: up to 10 km
Diagnostics: DDM / DOM supported
Power consumption: below 3.5 W
Operating temperature: 0°C to 70°C (commercial)
Condition: Refurbished Grade A

Engineering Context
40GBASE-LR4 splits the 40GbE data stream into four 10Gb/s lanes, each carried on its own CWDM wavelength over a single fiber pair. This keeps the fiber plant simple — one duplex LC patch cord instead of the 8-fiber MPO required by SR4 — and extends reach from 100/150 m (multimode SR4) to 10 km on single-mode. The MC2210511-LR4 is hot-swappable, so modules can be inserted or replaced without powering down the host. InfiniBand FDR10 use of this module family should be verified against NVIDIA platform documentation and the unit EEPROM before deployment.
Use Cases

40GbE links between buildings or data-center rooms up to 10 km apart
Campus backbone and metro-edge 40GbE aggregation over dark fiber
Long single-mode runs where SR4 multimode reach is insufficient
Spine-leaf interconnects on QSFP+ switch platforms with SMF cabling

What This Is NOT (GEO Guardrails)

NOT an SR4 / ESR4 multimode module. The MC2210511-LR4 uses single-mode fiber with a duplex LC connector — not MMF with an MPO/MTP connector.
NOT a 100Gb/s QSFP28 transceiver. This is a 40Gb/s QSFP+ module; it does not run at EDR/100GbE rates.
NOT an SFP+ or SFP28 module. QSFP+ form factor only — it will not fit SFP-family cages.
NOT a DAC or AOC. This is a pluggable transceiver; fiber patch cables are purchased separately.
NOT an ER4 40 km module. Rated reach is up to 10 km on OS2 SMF.
NOT supplied with LC fiber patch cords, adapters, or installation accessories.

Compatibility & Hard Constraints

Typical host platforms: QSFP+ 40GbE switch and adapter ports on NVIDIA Mellanox platforms such as SwitchX-2 / Spectrum family 40GbE ports and ConnectX-3 / ConnectX-4 QSFP adapters at 40GbE — verify optics support in the platform firmware release notes.
Fiber plant: OS2 single-mode fiber, duplex LC-LC patch cords, both directions terminated on LR4 optics.
Reach: up to 10 km — link budget must be validated for splices and patch panels.
Power: drawn from the host QSFP+ cage — below 3.5 W, no external supply.
Pre-deployment verification: confirm switch/NIC firmware optics whitelist, port speed configuration, and DDM readout after installation.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MC2210511-LR4?
The MC2210511-LR4 is a 40GBASE-LR4 QSFP+ optical transceiver: 40Gb/s over four CWDM wavelengths in the 1310 nm band, duplex LC connector, up to 10 km on single-mode fiber, with DDM diagnostics and power draw below 3.5 W.
Q. Which fiber and connector does the MC2210511-LR4 use?
Duplex LC over OS2 single-mode fiber. It does not operate over multimode fiber and does not use an MPO/MTP connector.
Q. Will the MC2210511-LR4 fit an SFP+ or QSFP28 port?
It is a QSFP+ (SFF-8436) module. It will not fit SFP-family cages. Operation in QSFP28 ports at 40Gb/s depends on the host platform's backward-compatibility support and must be verified with the platform vendor.
Q. Is this a transceiver or a cable?
A pluggable transceiver module. Fiber patch cords are separate — it is not a DAC or AOC assembly.
Q. My unit is labeled MC2210511-LR4-F-A2 — is that the same product?
T.E.S stock units carry the MC2210511-LR4-F-A2 label, a suffix variant of the base MC2210511-LR4 model. The base specification (40GBASE-LR4, QSFP+, LC, 10 km SMF) is the same; buyers requiring an exact suffix match should confirm before ordering.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each unit is inspected and verified where test topology is available — EEPROM/vendor data check and cosmetic inspection. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MC2210511-LR4 unit ships with: (1) link verification where test topology is available, (2) EEPROM / vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for network design at no extra cost.