NVIDIA Mellanox MCP7H70-V003 Passive Hybrid Copper Cable, 200Gb/s QSFP56 to 4x SFP56, 3m: This is a 3-meter passive copper splitter cable that breaks one 200Gb/s QSFP56 port into four 50Gb/s SFP56 connections. It is built for HDR InfiniBand and 200GbE Ethernet breakout topologies that fan out to 4x HDR100/50G endpoints. This is a passive direct-attach copper assembly, not an active optical or transceiver-based cable. This is a refurbished unit.
Engineering Context
The MCP7H70-V003 carries 4 lanes of 50Gb/s PAM4 on the QSFP56 head and splits them into four single-lane SFP56 tails, each running 50Gb/s PAM4. Built with 26AWG copper twinax, the cable supports the longer 3m reach typical of thicker-gauge PAM4 passive copper. The assembly is hot-pluggable, fully shielded for EMI containment, and avoids the power and latency overhead of optics in dense compute and storage racks.
Deployment & Use Cases
HDR Quantum switch ports broken out to 4x HDR100 endpoints on ConnectX-6 servers in dense GPU compute racks. 200GbE Spectrum-2 ToR ports fanned out to 4x 50GbE NVMe-oF storage targets. Cross-rack consolidation of 50Gb/s endpoints onto a smaller pool of 200Gb/s switch ports for cabling efficiency. AI/HPC clusters using 4:1 oversubscription patterns at the rack edge.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7H70-V003
Form Factor: QSFP56 to 4x SFP56 (Hybrid Splitter)
Data Rate: 200Gb/s breakout to 4x 50Gb/s
Lane Layout: Source 4x50G PAM4; Tails 1x50G PAM4 each
Cable Type: Passive Direct Attach Copper (DAC)
Conductor: 26AWG twinax
Length: 3m
Protocol: HDR InfiniBand / 200GbE Ethernet
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Designed for NVIDIA Quantum HDR InfiniBand switches and Spectrum-2 SN3000-series Ethernet switches with QSFP56 ports configured for breakout, paired with ConnectX-6 HDR100/50GbE adapters on the tail ends. Requires the source switch port to be explicitly configured for 4x50 breakout. The four tails cannot be used as independent 200Gb/s links — only one 200Gb/s source side is supported. Not interchangeable with QSFP28 or QSFP-DD cabling. Fixed 3m length, no field re-termination.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every cable for continuity, lane integrity, and connector seating before shipment. Visit tes-itsolutions.com for global shipping, expert consultation on HDR and 200GbE breakout fabrics, and 1–3 day handling on in-stock inventory.