NVIDIA Mellanox MCA4J80-N005 800Gb/s NDR Active Copper Cable, OSFP Twin-Port, 0.5m: This is a 0.5-meter active copper cable (ACC) engineered for 800Gb/s aggregate InfiniBand NDR connectivity using twin-port OSFP form factor (2x 400Gb/s NDR lanes). Active signal-conditioning electronics inside each OSFP connector enable reliable PAM4 transmission at NDR rates over copper. This is a fixed-length integrated assembly, not a passive DAC and not an optical transceiver pair. This is a new, factory-sealed unit.
Engineering Context
The MCA4J80-N005 carries 8x 100Gb/s PAM4 lanes (4 lanes per OSFP port, twin-port aggregate of 800Gb/s). At 0.5m, this is the shortest practical reach in the MCA4J80 family and is intended for adjacent-port connections inside a single rack unit. Active equalization compensates for connector and trace insertion loss at NDR signaling. Power draw stays well below equivalent active optical cables, and copper avoids the need for cleaning and inspection of optical end-faces.
Deployment & Use Cases
Top-of-rack-to-server short hops in NDR InfiniBand fabrics built on NVIDIA Quantum-2 QM9700 / QM9790 switches. Side-by-side switch stacking. Tightly-packed AI training pods using ConnectX-7 HCAs in 2x 400G mode. HPC compute racks where minimal cable bulk is critical for airflow and cable management.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCA4J80-N005
Form Factor: OSFP (Twin-Port) to OSFP (Twin-Port)
Aggregate Data Rate: 800Gb/s (2x 400Gb/s NDR)
Lane Configuration: 8x 100Gb/s PAM4
Cable Type: Active Copper Cable (ACC)
Length: 0.5m
Protocol: InfiniBand NDR
Reach Class: Ultra-short copper (intra-rack)
Condition: New — Factory-sealed
Compatibility & Hard Constraints
Compatible with NVIDIA Quantum-2 NDR InfiniBand switches (QM9700, QM9790) and ConnectX-7 NDR HCAs that expose OSFP twin-port cages. Both ends are OSFP twin-port; this is not a breakout to single-port OSFP or QSFP form factors. Not interoperable with HDR (200Gb/s) or EDR (100Gb/s) generation switches without proper port and protocol negotiation. Bend radius and jacket flex limits apply at this short length; do not force-route over tight corners.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS sources NDR-generation cabling directly and verifies every active copper cable for connector seating and lane integrity before shipment. Visit www.tes-itsolutions.com for inventory and bulk-quote requests. Standard handling time is 1 to 3 business days.