NVIDIA Mellanox MCP7H50-H003R26 InfiniBand HDR 200Gb/s QSFP56 to 2x100Gb/s QSFP56 Passive Copper Splitter Cable, 3m: This is a 3-meter passive copper splitter (Y-cable) that breaks one HDR 200Gb/s QSFP56 port into two HDR100 100Gb/s QSFP56 links. The cable is a fixed-length integrated assembly, not a transceiver pair. This is a refurbished unit.
Engineering Context
The MCP7H50-H003R26 uses 26 AWG twinaxial copper conductors (per the -R26 suffix) in a 1:2 hybrid splitter topology. The single QSFP56 host end aggregates 4 lanes at 50 Gb/s PAM4 (200 Gb/s total); each split end carries 2 lanes at 50 Gb/s PAM4 (100 Gb/s) as HDR100. As a passive cable it draws no power and adds negligible latency. Lane-mapping inside the cable is performed at the connector paddle cards, allowing port-density doubling on HDR switches.
Deployment & Use Cases
Doubling effective port density on Quantum HDR switches by serving two HDR100 hosts from one HDR switch port. GPU compute clusters running NCCL collectives over HDR100. HPC interconnect for tightly coupled MPI workloads. Storage fabric splitters for HDR100 NVMe-oF target connectivity within a rack.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7H50-H003R26
Cable Type: Passive Copper Splitter (1:2 Hybrid)
Form Factor: QSFP56 to 2x QSFP56
Length: 3m
Host Data Rate: HDR 200Gb/s (4x 50Gb/s PAM4)
Branch Data Rate: HDR100 100Gb/s per branch (2x 50Gb/s PAM4)
Conductor: 26 AWG Twinaxial Copper
Protocol: InfiniBand HDR / HDR100
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Quantum QM8700/QM8790 HDR switches and ConnectX-6 HDR/HDR100 VPI adapters configured for InfiniBand. Requires the QSFP56 host port to be configured for split (HDR100) operation in the subnet manager. Not compatible with EDR-only switch ports without rate negotiation. Not for Ethernet-mode QSFP56 unless explicitly supported by the host firmware. Fixed 3m length; non-detachable connectors.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS validates every HDR splitter cable for link bring-up on both branches, paddle-card EEPROM integrity, and connector condition before shipment. Visit tes-itsolutions.com for HDR fabric design consultation. Stocked in the EU with 1–3 day handling and global shipping.