NVIDIA Mellanox MCA7J75-N004 OSFP to 4x QSFP112 800G NDR Active Copper Splitter Cable, 4m: This is a 4-meter active copper breakout cable for InfiniBand NDR fabrics. It splits a single 800Gb/s OSFP switch port into four independent 200Gb/s QSFP112 NDR200 connections. This is a 1-to-4 splitter assembly, not a straight OSFP-to-OSFP cable or a transceiver pair. This is a new unit.
Engineering Context
The MCA7J75-N004 carries the NVIDIA part number 980-9I76G-00N004. It uses port-powered active copper redriver electronics integrated into the OSFP shell to maintain signal integrity at NDR rates over the 4-meter span where passive copper would not deliver clean eyes. The OSFP head connects to the switch port and drives all four QSFP112 branches simultaneously, presenting four independent 200Gb/s NDR200 lanes. The cable draws power from the OSFP cage.
Deployment & Use Cases
GPU node aggregation in NVIDIA Quantum-2 InfiniBand fabrics, where one OSFP NDR switch port fans out to four ConnectX-7 NDR200 NICs in adjacent racks. Multi-host server connectivity in HPC and AI clusters. NDR fat-tree and dragonfly topologies that need to maximize switch port density across compute nodes. Storage-fabric splits in GPUDirect Storage deployments.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCA7J75-N004
NVIDIA P/N: 980-9I76G-00N004
Form Factor: OSFP to 4x QSFP112 (1-to-4 splitter)
Aggregate Data Rate: 800Gb/s
Branch Data Rate: 4x 200Gb/s NDR200
Cable Type: Active Copper Cable (ACC)
Length: 4m
Protocol: InfiniBand NDR
Condition: New — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Quantum-2 NDR OSFP switches (MQM9700, MQM9790) on the host side and NVIDIA ConnectX-7 NDR200 QSFP112 adapters on the branch side. Requires switch port firmware configured for splitter operation. Not compatible with HDR/EDR-only ports. QSFP112 is electrically distinct from QSFP-DD and QSFP56; do not insert into 400G Ethernet QSFP-DD cages. The OSFP head requires sufficient cage power budget (active cable, not passive). Fixed 4m length; this is not a straight OSFP-to-OSFP cable, not a 2-branch splitter, and not an Ethernet-mode cable.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS validates each splitter assembly for branch-by-branch BER performance and OSFP redriver integrity before shipment. Visit https://www.tes-itsolutions.com for our full Mellanox NDR cabling inventory. Standard order handling time is 1–3 business days.