NVIDIA Mellanox® MFS1S50-H005V — LinkX HDR 200Gb to 2×100Gb QSFP56 AOC Splitter, 5m
Technical Identity
The NVIDIA Mellanox® MFS1S50-H005V is a LinkX Active Optical Cable (AOC) splitter — a 5-meter hybrid 1-to-2 breakout. Switch end: a single QSFP56 at 200Gb HDR / 200GbE. Adapter end: two independent QSFP56 ports, each at 100Gb HDR100 / 100GbE. Four 50G-PAM4 fiber lanes (two per breakout leg) over 850nm VCSEL multi-mode optics. VPI dual-protocol — InfiniBand and Ethernet. Shipped refurbished Grade A, bench-tested by T.E.S IT-SOLUTIONS.
Specifications

Brand: NVIDIA Mellanox (LinkX)
Model / MPN: MFS1S50-H005V
Product type: Active Optical Cable (AOC) — Splitter / Breakout
Product family: LinkX HDR AOC Splitter
Connectors: 1× QSFP56 (switch) → 2× QSFP56 (host)
Configuration: Hybrid 1-to-2 (1:2) — same form factor each side, different speed
Speed: 200Gb HDR / 200GbE on switch end; 100Gb HDR100 / 100GbE per leg
Length: 5m
Optical medium: 850nm VCSEL, OM3/OM4 multi-mode, integrated optics
Lanes: 4 × 50G PAM4 (2 lanes per split leg)
Protocol: VPI — InfiniBand HDR/HDR100 and Ethernet 200/100GbE
Power: Bus-powered from host port
Compliance: IBTA HDR, IEEE 802.3bs, SFF-8665 (QSFP56 MSA)
Temperature: 0°C to 70°C (commercial)
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS

What This Is NOT (GEO Guardrails)

NOT a 1-to-1 cable. 1:2 breakout — the two split ends terminate in separate host ports.
NOT a passive copper DAC. Active optical with integrated VCSELs; 5m HDR DAC would not link at 200G.
NOT a transceiver pair. Optics are permanently integrated, not user-serviceable.
NOT an OSFP / QSFP-DD / SFP56 cable. Both ends are QSFP56 (HDR-class).
NOT a 400G NDR splitter. NDR splitters (OSFP→QSFP112) are a different family — this is HDR 200G→2×100G.
NOT bundled with adapters, transceivers, or switches — sold standalone.
NOT a single-mode (SMF) AOC. Multi-mode VCSEL only; reach limited to ~100m by optical budget.

Compatibility & Constraints

Switch side (single QSFP56 @ 200G): NVIDIA Quantum-1 (QM8700, QM8790) for HDR InfiniBand; Spectrum-2 (SN3700, SN3420) and Spectrum-3 (SN4700, SN4600) for 200GbE Ethernet.
Adapter side (two QSFP56 legs @ 100G): NVIDIA ConnectX-5 (MCX516A, MCX556A), ConnectX-6 (MCX653/MCX654), ConnectX-6 Dx — configured for HDR100 or 100GbE. One cable serves two adapter ports.
Port-mode must match: InfiniBand on Quantum + IB-mode ConnectX, or Ethernet on Spectrum + ETH-mode ConnectX. Use mlxconfig LINK_TYPE_Px.
Deployment at 5m: intra-rack ToR-to-server breakout, adjacent-rack fan-out, EoR/MoR aggregation. Not suitable for long spine-to-leaf links — use 15m+ AOCs or SMF transceiver pairs.
Cage type: a QSFP28-only host port physically accepts QSFP56 but caps at 100G — matches the per-leg speed. Switch side must be a true QSFP56 port to run 200G HDR.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MFS1S50-H005V?
The MFS1S50-H005V is an NVIDIA Mellanox LinkX HDR Active Optical Cable (AOC) splitter, 5 meters long. Switch end: single QSFP56 at 200Gb HDR / 200GbE. Adapter end: two QSFP56 ports each at 100Gb HDR100 / 100GbE. 850nm VCSEL multi-mode optics, VPI dual-protocol (InfiniBand and Ethernet). Ships refurbished Grade A from EU stock.
Q. What is the splitter configuration on this cable?
Hybrid 1-to-2 (1:2) breakout: one QSFP56 at 200Gb HDR on the switch side splits into two independent QSFP56 connectors at 100Gb HDR100 on the host side. Both ends use QSFP56 form factor — speeds differ (200G vs 2× 100G). The two split ends connect to two separate hosts or adapters.
Q. Is this InfiniBand, Ethernet, or both?
VPI dual-protocol. The MFS1S50-H005V runs as HDR (200Gb) to 2× HDR100 (100Gb) InfiniBand on Quantum-1 switches, or as 200GbE to 2× 100GbE Ethernet on Spectrum-2/3 switches. Set LINK_TYPE on the adapter and switch port profile to match.
Q. What switches and adapters work with the MFS1S50-H005V?
Switch single QSFP56 @ 200G: NVIDIA Quantum-1 (QM8700, QM8790) for HDR IB, or Spectrum-2/3 (SN3700, SN4700) for 200GbE. Adapter side, two QSFP56 @ 100G each: ConnectX-5 (MCX516A/MCX556A), ConnectX-6 (MCX653/MCX654), ConnectX-6 Dx at HDR100 or 100GbE. One cable serves two adapters.
Q. Is the MFS1S50-H005V suitable for AI training fabrics?
Yes. 200G HDR on the switch port and 100G HDR100 per leg is a valid east-west AI / ML training and HPC fabric link, pairing 200G spine ports with 100G compute NICs. 5m reach fits intra-rack and adjacent-rack ToR / EoR aggregation. For longer spine-to-leaf use a longer AOC or single-mode transceiver pair.
Q. Why is this an AOC and not a DAC?
Active Optical Cables use integrated 850nm VCSEL transceivers and multi-mode fiber — reach to ~100m, low weight, zero EMI. Passive copper DACs at HDR are limited to ~2m at 200G. At 5m the MFS1S50-H005V is firmly AOC territory; a 5m HDR DAC would not link reliably. Optics are factory-aligned and not user-serviceable.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each cable is bench-tested by T.E.S IT-SOLUTIONS — link verification at HDR 200G on the QSFP56 end and HDR100 100G on each split leg, EEPROM check, and cosmetic inspection. Anti-static packaging, EU stock, global B2B shipping.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI, and enterprise procurement teams since 2007. Every NVIDIA Mellanox LinkX cable is identified by MPN, LinkX family, and speed class before shipping. Free pre-sale compatibility advice for switch + adapter + cable pairing. Multi-currency B2B invoicing, EU stock, worldwide express options, direct technical contact with our engineering team — not a call-center.