NVIDIA Mellanox MCA7J50-H005R Active Copper Splitter Cable, 200G HDR to 2x 100G HDR100, 5m: This is a 5-meter active copper splitter cable that breaks one 200Gb/s HDR QSFP56 link into two independent 100Gb/s HDR100 QSFP56 links. The cable is a fixed-length Y-assembly with one QSFP56 connector on the switch end and two QSFP56 connectors on the host end, each running at HDR100 (4x 25Gb/s NRZ). Active signal conditioning is integrated into the connectors. This is not a passive DAC and not an AOC. This is a refurbished unit.
Engineering Context
The MCA7J50-H005R uses internal redrivers to maintain HDR signal integrity over 5 meters of copper, where passive splitter assemblies cannot reliably operate at 200Gb/s. On the switch side the cable presents one HDR QSFP56 port; the switch port must be configured for 2-to-1 split mode so each lane pair drives a separate HDR100 link. The host side terminates in two independent QSFP56 connectors, each behaving as a discrete HDR100 endpoint. This topology doubles host port density on a single HDR switch port at the cost of per-host bandwidth (100Gb/s rather than 200Gb/s).
Deployment & Use Cases
HPC clusters where a single HDR switch port aggregates two ConnectX-6 HDR100 servers. Storage and compute pod density expansion in Quantum HDR fabrics. Cost-optimized 100Gb/s deployments that reuse existing HDR switch infrastructure. Lab and burn-in benches needing twin HDR100 endpoints from one switch port.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCA7J50-H005R
Form Factor: QSFP56 to 2x QSFP56 (Y-Splitter)
Switch-Side Rate: 200Gb/s HDR (4x 50Gb/s PAM4)
Host-Side Rate: 2x 100Gb/s HDR100 (4x 25Gb/s NRZ per leg)
Cable Type: Active Copper Cable (ACC) with redrivers
Length: 5 meters
Protocol: InfiniBand HDR / HDR100
Power: Active (host-powered)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Quantum HDR InfiniBand switches (QM8700, QM8790) configured for 2-to-1 splitter mode on the source port and ConnectX-6 VPI adapters running at HDR100. Requires the switch port to be explicitly enabled in split mode; the cable will not work on a port configured for native 200G HDR. Not compatible with NDR Quantum-2 switches or 100GbE-only Ethernet ports without VPI configuration. Not a 200GbE-to-2x100GbE Ethernet splitter — this assembly is for InfiniBand HDR/HDR100 fabrics. Fixed 5m length.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS validates each splitter for both legs at HDR100 link rate, verifies redriver function, and inspects connector wear before shipment. See the full catalog at https://www.tes-itsolutions.com. Handling time is 1–3 business days.