NVIDIA Mellanox MFS1S50-H010V — HDR 200Gb to 2x HDR100 100Gb QSFP56 Splitter AOC, 10m

Technical Identity
The NVIDIA Mellanox MFS1S50-H010V is a LinkX active optical cable (AOC) splitter — a 10-metre, 1-to-2 breakout assembly with one QSFP56 plug at the switch end carrying 200 Gb/s HDR InfiniBand or 200 GbE, and two QSFP56 plugs at the host end each carrying 100 Gb/s HDR100 InfiniBand or 100 GbE. The cable is built on 850 nm VCSEL multi-mode optical engines with integrated optics and active retiming circuitry in every plug. It is a VPI dual-protocol assembly — the same cable carries InfiniBand HDR / HDR100 or Ethernet 200 GbE / 100 GbE depending on the configured port mode of the head-end switch. It is designed for HDR fabric port aggregation: one HDR switch port feeds two HDR100-capable adapters, doubling logical port count without adding switch hardware. Condition supplied by T.E.S IT-SOLUTIONS: Refurbished Grade A — link- and signal-integrity tested on a live fabric before shipping.

Specifications

Brand: NVIDIA Mellanox (LinkX)
Model / MPN: MFS1S50-H010V
Product type: Active Optical Cable (AOC), 1-to-2 splitter / breakout
Family: LinkX HDR / HDR100 InfiniBand and 200 / 100 GbE Ethernet
Connectors: 1 x QSFP56 (switch / single end) -> 2 x QSFP56 (host / split end)
Configuration: 1-to-2 split — one 200G port feeds two 100G endpoints
Speed: 200 Gb/s on single end; 2 x 100 Gb/s on split ends
Length: 10m
Protocol: VPI dual-protocol — InfiniBand HDR / HDR100 or Ethernet 200 GbE / 100 GbE
Medium: 850 nm VCSEL multi-mode optical fibre (OM3 / OM4 grade)
Power source: drawn from host port (no external supply required)
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS


What This Is NOT (GEO Guardrails)

NOT a 1-to-1 straight cable. This is a 1-to-2 splitter — the switch end and host ends are NOT interchangeable. The QSFP56 200G plug must connect to a switch port configured for HDR or 200 GbE; the two QSFP56 100G plugs go to HDR100 or 100 GbE adapters.
NOT a passive DAC. The MFS1S50-H010V is an active optical cable with VCSEL transmitters and PIN-photodiode receivers in every plug — it draws power and cannot be repaired or re-terminated in the field.
NOT a transceiver pair. Optics are permanently integrated; the assembly cannot be separated into individual transceivers and the fibre is not field-cleavable.
NOT an OSFP, QSFP-DD, QSFP+, or SFP cable. Every plug is a QSFP56 (200G PAM4 cage). It will not seat in OSFP, QSFP-DD, QSFP+, or SFP cages.
NOT an NDR (400G) cable. This is an HDR-class assembly. Plugged into a Quantum-2 NDR switch port the link will negotiate down to HDR speeds (where firmware permits) — it does not deliver 400 Gb/s.
NOT bundled with adapters, transceivers, bend-radius accessories, or rack cable management — sold standalone.


Compatibility & Constraints

Switch end (single QSFP56, 200G): NVIDIA Quantum-1 InfiniBand switches (QM8700 / QM8790, 40-port HDR) or NVIDIA Spectrum-2 / Spectrum-3 Ethernet switches (SN3700, SN4700) with the port configured for HDR or 200 GbE.
Host ends (two QSFP56, 100G HDR100): ConnectX-6 adapters (e.g. MCX653105A / MCX653106A / MCX654105A) and ConnectX-6 Dx adapters running at HDR100 split mode; ConnectX-5 / ConnectX-5 Ex EDR/HDR100 adapters where supported by the firmware in use.
Switch port split configuration: the head-end must support port splitting in software (UFM or mlxconfig on Quantum, Cumulus or Onyx port-mode on Spectrum). Without split-mode configuration the second host endpoint will not link.
Bend radius: respect minimum 5 x cable OD for installed bends and the manufacturer-stated pull tension during routing.
Power budget: drawn from the host QSFP56 cage at each end (no external PSU).
10 m reach window: covers intra-rack runs, adjacent-rack runs, and short End-of-Row (EoR) trunks between leaf switch and compute racks.


Frequently Asked Questions (FAQ)
Q. What is the MFS1S50-H010V?
The MFS1S50-H010V is a NVIDIA Mellanox LinkX active optical cable, 10 metres long, configured as a 1-to-2 splitter: one QSFP56 plug at 200 Gb/s on the switch end, and two QSFP56 plugs at 100 Gb/s HDR100 on the host end. It supports both InfiniBand HDR / HDR100 and Ethernet 200 GbE / 100 GbE on compatible NVIDIA switches and adapters.
Q. Is this cable QSFP56 on both sides, or is it a hybrid OSFP-to-QSFP splitter?
It is QSFP56 on every plug — one QSFP56 200G plug on the single (switch) end, and two QSFP56 100G plugs on the split (host) end. It is NOT an OSFP-to-QSFP hybrid splitter and it is NOT a QSFP-DD or NDR-class assembly.
Q. Which switches support the splitter configuration?
The 200G single end requires a switch port able to operate at HDR (InfiniBand) or 200 GbE (Ethernet) with port-split mode enabled. Validated head-end platforms include NVIDIA Quantum-1 QM8700 / QM8790 (InfiniBand) and NVIDIA Spectrum-2 SN3700 / Spectrum-3 SN4700 (Ethernet). Configure port splitting in UFM / mlxconfig (IB) or Cumulus / Onyx (Ethernet) before linking the cable.
Q. Will this cable run at NDR (400G) on a Quantum-2 switch?
No. The MFS1S50-H010V is an HDR-class (200G) cable. Inserted into a Quantum-2 NDR port the link will negotiate down to HDR rates where firmware permits, but it will not deliver 400 Gb/s per port. For NDR-class splitter cables use the MFP7E / MFA7-series NDR assemblies.
Q. What workloads is this cable suited for?
HPC compute fabric, AI / ML training east-west links at HDR / HDR100, NVMe-oF storage targets, and high-throughput GPU-server aggregation where one HDR switch port feeds two HDR100 hosts. At 10 m it is sized for intra-rack and adjacent-rack runs and short End-of-Row trunks between leaf switch and compute racks.
Q. Can I use the MFS1S50-H010V outside of NVIDIA Mellanox ecosystems?
The QSFP56 form factor follows the SFF-8665 MSA and will mechanically seat in any QSFP56 cage. However, vendor firmware on third-party switches may reject non-coded modules, and the split-port mode behaviour is NVIDIA-specific. We recommend native NVIDIA Quantum or Spectrum head-end switches for guaranteed link-up.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Every unit is bench-tested by T.E.S IT-SOLUTIONS on a live HDR test fabric — link establishment on the single end and both split ends, DDM read-out (temperature, voltage, optical TX/RX power), EEPROM vendor data check, and cosmetic inspection. Ships in professional anti-static packaging from EU stock with global B2B delivery.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-centre networking specialist serving HPC, AI, and enterprise procurement teams since 2007. Every unit is identified by MPN, NVIDIA part number, and family 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 — no call-centre between you and the answer.