NVIDIA Mellanox MC2206128-004 40GbE QSFP+ Passive Copper Direct-Attach Cable, 4m: This is a 4-meter passive copper direct-attach cable (DAC) terminated in QSFP+ connectors on both ends. The cable is engineered for 40 Gigabit Ethernet (40GbE) point-to-point links between switches and adapters. This is a fixed-length integrated assembly, NOT a transceiver with a separate patch cord, NOT an active optical cable, and NOT a 56Gb/s FDR cable. This unit is New.
Engineering Context
The MC2206128-004 carries 40GbE as four lanes of 10Gb/s NRZ over twinaxial copper conductors. As a passive cable it consumes 0W and adds no latency from active electronics. Passive copper at 40G class is reach-limited; 4m is a typical mid-rack to adjacent-rack span. The PVC outer jacket is intended for general data center routing. The cable provides full EMI immunity and never requires laser safety considerations.
Deployment & Use Cases
Top-of-rack switch to server uplinks for ConnectX-2 EN, ConnectX-3 EN/Pro, and ConnectX-3 VPI adapters at 40GbE. Rack-internal switch interconnects on SX1024, SX1036, and IS5000-series switches. Storage controller connectivity to 40GbE backbones. HPC clusters using 40GbE as the management or storage fabric.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MC2206128-004
Form Factor: QSFP+ to QSFP+ (Point-to-Point)
Data Rate: 40GbE (4x 10Gb/s NRZ)
Cable Type: Passive Copper DAC
Length: 4m
Jacket: PVC
Protocol: 40GbE Ethernet
Power: Passive (0W)
Condition: New — Sealed by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Mellanox SX1024 / SX1036 / SX6036 (Ethernet mode) switches and ConnectX-2/3-series adapters running at 40GbE. The host port must be configured for 40GbE Ethernet, not 56Gb/s FDR or InfiniBand QDR. NOT a 4x10G breakout to SFP+ — both ends are QSFP+. Length is fixed at 4m. Passive copper reach is limited; for distances beyond 5m use an active optical cable instead.
Why TES
T.E.S IT-SOLUTIONS verifies every passive DAC for connector seating, conductor continuity, and EEPROM identity before shipment. We provide expert consultation on Ethernet rack cabling, global shipping, and a 1–3 day handling time. Visit tes-itsolutions.com for the full catalog.