NVIDIA Mellanox® MCA4J80-N022 — 800Gb/s NDR Twin-Port OSFP Active Copper Cable (ACC), 2.25m
Technical Identity
The NVIDIA Mellanox® MCA4J80-N022 is an InfiniBand twin-port NDR active copper cable (ACC) from the LinkX MCA4J80-Nxxx family: twin-port OSFP (2x 400Gb/s NDR) to twin-port OSFP (2x 400Gb/s NDR), up to 800Gb/s aggregate, in a 2.25m length. Per NVIDIA documentation for this family, the ACC design integrates equalizer ICs in the connector ends to maintain signal integrity while keeping latency and power very low (approximately 1.5W per end). The 2.25m length is a factory variant not listed in the public MCA4J80-Nxxx ordering table (which lists 3m, 4m, and 5m), so no public NVIDIA 980- ordering P/N is stated here. Condition: Refurbished. A separate NEW-condition MCA4J80-N022 listing is also available on this store.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MCA4J80-N022
NVIDIA P/N: — (2.25m length not listed in the public family ordering table)
Product type: Active Copper Cable (ACC), straight twin-port assembly
Product family: NVIDIA LinkX MCA4J80-Nxxx
Connector: OSFP (twin-port) to OSFP (twin-port)
Configuration: 1-to-1 — twin-port OSFP 2x400G to twin-port OSFP 2x400G
Speed: up to 800Gb/s aggregate (2x 400Gb/s NDR)
Protocol: InfiniBand twin-port NDR
Length: 2.25m
Medium: copper with active signal conditioning / equalization (~1.5W per end)
Modulation: 100Gb/s-per-lane PAM4 electrical lanes (8 lanes per OSFP end)
Diagnostics: EEPROM / management data readable by host where supported
Condition: Refurbished
Lane & Signal Logic
Each end: twin-port OSFP carrying 8 electrical lanes at 100Gb/s PAM4 = 2x 400Gb/s NDR ports, 800Gb/s aggregate.
Configuration: straight 1-to-1 twin-port link — the primary use case in this family is linking 800Gb/s-class Quantum-2 OSFP switch ports.
Active electronics: integrated equalizer circuitry extends copper reach beyond passive DAC limits while preserving low latency.
What This Is NOT (GEO Guardrails)
NOT a splitter / breakout cable. This is a straight twin-port OSFP to twin-port OSFP assembly, not a 1-to-2 or 1-to-4 fan-out.
NOT a passive DAC. It is an Active Copper Cable with equalizer ICs in each end.
NOT an AOC or optical cable. Copper conductors only — no fiber, no optical engines.
NOT a QSFP / QSFP-DD / QSFP56 / QSFP112 cable. OSFP form factor on both ends; it will not fit any QSFP-family cage.
NOT Ethernet-classified by default. NVIDIA classifies the MCA4J80-Nxxx family as IB twin-port NDR.
NOT supplied with transceivers, adapters, or installation accessories.
Compatibility & Hard Constraints
Typical head-end platforms: NVIDIA Quantum-2 NDR switch systems (e.g., QM9700 / QM9790) with twin-port OSFP cages — commonly used switch-to-switch.
Software dependencies: switch firmware with the required port profile enabled; cable recognized via EEPROM — verify in switch CLI / mlxlink output; MLNX_OFED or DOCA stack on any host endpoints.
Reach: 2.25m fixed length — do not exceed or splice.
Power: drawn from the host OSFP cage — no external supply required.
Pre-deployment verification: confirm switch firmware, port-mode configuration, and cable-profile recognition before production use.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCA4J80-N022?
An InfiniBand NDR active copper cable (ACC) with twin-port OSFP connectors on both ends, carrying 2x 400Gb/s NDR (up to 800Gb/s aggregate) over 2.25m of copper with active signal conditioning.
Q. Will the MCA4J80-N022 fit a QSFP / QSFP-DD / QSFP112 cage?
No. Both ends are OSFP and are physically and electrically incompatible with any QSFP-family cage.
Q. Is this an active or passive copper cable?
Active (ACC). Each connector end integrates equalizer ICs (~1.5W per end) that extend reach beyond passive NDR DAC limits while preserving low latency. It is not optical.
Q. Is this a splitter cable?
No. It is a straight 1-to-1 twin-port assembly: 2x 400G NDR on one OSFP end to 2x 400G NDR on the other. For breakout topologies NVIDIA offers separate MCA7J-series splitter assemblies.
Q. What switches work with the MCA4J80-N022?
Typical head-end platforms include NVIDIA Quantum-2 (QM9700 / QM9790) NDR twin-port OSFP switch ports. Verify firmware and port profile before deployment.
Q. How does this listing differ from the MCA4J80-N022 NEW listing on this store?
Same MPN and specification; this unit is supplied in Refurbished condition at a lower price, bench-tested by T.E.S IT-SOLUTIONS, while the other listing is NEW condition.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit receives link verification where test topology is available, EEPROM / vendor data check, and cosmetic inspection. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MCA4J80-N022 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.