NVIDIA Mellanox MFA7U20-H010 InfiniBand 400G OSFP to 4x 100G QSFP56 HDR100 Active Optical Splitter, 10m: This is a 10-meter active optical splitter cable that converts a single 400Gb/s twin-port OSFP InfiniBand interface into four 100Gb/s QSFP56 (HDR100) endpoints. The integrated optics re-time and electrically isolate each lane group. This is a fixed-length integrated assembly, not a transceiver with a detachable patch cord. This is a refurbished unit.
Engineering Context
The MFA7U20-H010 carries 8x 50Gb/s PAM4 lanes on the OSFP side, mapped as four 2-lane HDR100 groups (4x 100Gb/s) on the QSFP56 side. At 10 meters it bridges cross-rack and short cross-row spans where copper splitters cannot maintain signal integrity at 400G aggregate fan-out. The OSFP form factor includes an integrated finned heat sink for active power dissipation; ensure the host switch maintains MSA-compliant airflow. Active optics provide complete EMI immunity, low weight, and tighter bend radius (30mm minimum recommended) than equivalent copper, easing routing through dense cable trays.
Deployment & Use Cases
Connecting NVIDIA Quantum-2 (NDR) switch OSFP ports configured in 4x HDR100 split mode to ConnectX-6 HDR100 HCAs across racks. Maximizing port density of OSFP-based InfiniBand spine or leaf switches feeding HDR100 compute or storage nodes over 10m runs. Mixed-generation HPC fabrics fanning out a 400G uplink to four 100G server NICs across rack rows.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MFA7U20-H010
Form Factor: OSFP to 4x QSFP56 (Splitter)
Data Rate: 400Gb/s split to 4x 100Gb/s InfiniBand HDR100
Lane Mapping: 8x 50Gb/s PAM4 (OSFP) to 4x 2x 50Gb/s PAM4 (QSFP56)
Cable Type: Active Optical Cable (AOC)
Length: 10m
Jacket: LSZH
Media: Multimode Fiber (MMF)
Protocol: InfiniBand HDR100 (split from twin-port OSFP)
Bend Radius: 30mm minimum
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Quantum-2 (NDR) switches with OSFP ports configured for 4x100G HDR100 split mode and ConnectX-6 HDR100 HCAs on the QSFP56 side. Requires switch firmware that supports 4x HDR100 split-mode signaling. Not compatible with QSFP-DD ports (OSFP is mechanically incompatible). Not validated for Ethernet-only platforms. Each QSFP56 leg operates at HDR100 (100Gb/s), not full HDR (200Gb/s). Fixed 10m length — not field-shortenable.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every splitter AOC for all four QSFP56 leg link integrity, optical power, and connector condition before shipment. We provide expert consultation on InfiniBand HDR/NDR fabric cabling, global shipping with 1–3 day handling, and comprehensive warranty. Visit tes-itsolutions.com.