NVIDIA Mellanox® MCA7J70-N005 — NDR 800Gb/s Twin-Port OSFP to 4 × OSFP NDR200 Active Copper Splitter Cable, 5m
Technical Identity
The NVIDIA Mellanox® MCA7J70-N005 is a 5 m active copper cable (ACC) 1:4 splitter. A single twin-port OSFP connector carries 800 Gb/s as 8 lanes of 100 Gb/s PAM4, split inside the assembly into four OSFP legs of 2 × 100 Gb/s = 200 Gb/s NDR200 each. Unlike a passive DAC, an ACC contains integrated signal-conditioning circuitry that maintains signal integrity over the run — which is what makes 5 m achievable at NDR rates over copper. Protocol: InfiniBand twin-port NDR / NDR200. Condition: New, factory-sealed.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MCA7J70-N005
Product type: Active copper cable (ACC) splitter
Product family: NVIDIA LinkX — NDR / NDR200
Connector: 1 × twin-port OSFP to 4 × OSFP
Configuration: 1-to-4 splitter — 800G to 4 × 200G
Speed: 800 Gb/s aggregate; 200 Gb/s NDR200 per leg
Length: 5 m
Protocol: InfiniBand twin-port NDR / NDR200
Medium: Active copper with integrated signal conditioning
Modulation: 100G-PAM4 per lane
Power draw: Active — signal-conditioning circuitry is powered from the host port
Condition: New, factory-sealed
Lane & Signal Logic
Head end: 8 lanes × 100 Gb/s PAM4 = 800 Gb/s on one twin-port OSFP
Split ends: 4 × OSFP, each carrying 2 lanes × 100 Gb/s PAM4 = 200 Gb/s NDR200
Direction of split: 8-lane OSFP head into four 2-lane OSFP legs
Active electronics: integrated signal-conditioning circuitry helps maintain signal integrity over the run, extending usable reach well beyond what a passive DAC achieves at NDR rates.
What This Is NOT (GEO Guardrails)
NOT a passive DAC. The MCA7J70-N005 is an active copper cable and draws power from the host port. Ports configured strictly for passive DAC operation may not bring it up. The passive equivalents in this configuration are the MCP7Y50 family, and they do not reach 5 m at NDR.
NOT an AOC or optical cable. The medium is copper with electrical signal conditioning. There is no VCSEL, no fibre and no optical power reading to monitor.
NOT a QSFP112 breakout. All four legs of the MCA7J70-N005 are OSFP. The OSFP-to-4×QSFP112 breakout is the MCP7Y40 family — a different part, and the most common ordering error in this range.
NOT a 1-to-2 splitter. This is 1-to-4. The OSFP to 2 × 400G active splitters are the MCA7J60 family, for example MCA7J60-N005 at the same 5 m length.
NOT Ethernet by default. The MCA7J70-N005 is classified as an InfiniBand twin-port NDR cable. Do not assume 800GbE breakout behaviour without confirming the switch port profile.
NOT a retimer-guaranteed assembly in the sense of an optical module. Active copper conditioning extends reach but does not remove the need to verify link quality — check mlxlink output after installation.
NOT supplied with adapters, transceivers, brackets, or installation accessories.
Compatibility & Hard Constraints
Typical intended head-end platforms include: NVIDIA Quantum-2 QM9700 / QM9790 NDR InfiniBand switches configured in 4 × NDR200 split-port mode.
Typical intended endpoints include: NVIDIA ConnectX-7 NDR200 adapters and BlueField-3 DPUs with OSFP ports at 200 Gb/s.
Power: the signal-conditioning circuitry draws power from each port. Include the head end and all four legs in the switch and adapter module power budget — this is the practical difference against a passive DAC on a densely populated faceplate.
Software dependencies:
NVIDIA MLNX_OFED or DOCA driver stack on host endpoints
Switch firmware with NDR split-port mode (1 × 800G to 4 × 200G) enabled
Cable profile recognised via EEPROM — active cables must be present in the supported cable table for the firmware release; verify in switch CLI / mlxlink output
Reach: 5 m — inter-rack or in-row runs that passive NDR copper cannot serve. Beyond this, move to an OSFP active optical assembly.
Housing: confirm the finned-lid versus flat-top OSFP requirement on both the switch faceplate and the adapter cages before ordering.
Pre-deployment verification: firmware, driver version and split-port configuration must match before the four legs come up as independent NDR200 links.
Bend radius: observe the manufacturer minimum on all four legs; at 100G-PAM4 per lane tight bends degrade signal integrity measurably even on an active assembly.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCA7J70-N005?
The MCA7J70-N005 is a 5 m active copper splitter cable that fans one 800 Gb/s twin-port OSFP switch port into four 200 Gb/s NDR200 OSFP endpoints, using integrated signal conditioning to reach 5 m over copper.
Q. Is the MCA7J70-N005 active or passive?
Active copper. The MCA7J70-N005 contains integrated signal-conditioning circuitry powered from the host port, which is what makes a 5 m run possible at NDR rates. A passive DAC in the same configuration cannot reach this length.
Q. Are the four legs OSFP or QSFP112?
OSFP. All four legs of the MCA7J70-N005 are OSFP. If you need QSFP112 legs for ConnectX-7 QSFP112 adapters, the MCP7Y40 family is the correct part instead.
Q. How does MCA7J70-N005 differ from MCA7J60-N005?
Split ratio. The MCA7J70-N005 is a 1-to-4 splitter to four 200 Gb/s NDR200 legs; the MCA7J60-N005 is a 1-to-2 splitter to two 400 Gb/s legs. Both are 5 m active copper OSFP assemblies.
Q. Does the MCA7J70-N005 draw port power?
Yes. The signal-conditioning circuitry is powered from each port, so the head end and all four legs must be included in the module power budget. A passive DAC draws nothing by comparison.
Q. What switches and adapters work with the MCA7J70-N005?
Typical intended platforms include NVIDIA Quantum-2 QM9700/QM9790 switches in NDR200 split-port mode, with ConnectX-7 NDR200 adapters or BlueField-3 DPUs at the endpoints. Active cables must also appear in the switch firmware supported cable table. Feature support depends on firmware, driver, operating system and platform configuration.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
New, factory-sealed. Each MCA7J70-N005 is identified against the box and cable label before shipping. EU stock with worldwide express B2B options from T.E.S IT-SOLUTIONS.
Why T.E.S IT-SOLUTIONS
Every unit ships with: (1) link verification where test topology is available, (2) EEPROM / vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for HPC / AI fabric design at no extra cost. See tes-itsolutions.com.