NVIDIA Mellanox MC2210126-004 40GbE Passive Copper DAC, QSFP+ to QSFP+, 4m — Lot of 4: This is a 4-meter passive copper direct-attach cable (DAC) for 40GbE Ethernet on QSFP+ ports. The cable is a single fixed assembly with QSFP+ heads on both ends, not a transceiver pair with a patch cord. Each link is purely passive: no active electronics, no power draw. The lot includes 4 refurbished cables, each tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MC2210126-004 is engineered for short-reach 40GbE Ethernet links inside a rack or to an adjacent rack. Passive copper DACs are the most cost-effective and lowest-latency option at sub-7m reach: zero active power, no laser warm-up, and no FEC overhead beyond what the host adapter performs. The 4m length sits in the sweet spot for inter-rack patching where 1m or 3m is too short and 5m or 7m exceeds the routing path.
Deployment & Use Cases
Top-of-Rack 40GbE server uplinks to Mellanox SX1000-series and SwitchX-2 (SX1036, SX1024) Ethernet switches. ConnectX-3 EN, ConnectX-3 Pro EN, and ConnectX-4 Lx 40GbE adapter to switch interconnects. Storage fabrics where 40GbE QSFP+ links are required at short reach. Cluster builds requiring multiple identical short-run cables, supplied as a 4-piece lot.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MC2210126-004
Form Factor: QSFP+ to QSFP+ (Point-to-Point)
Cable Type: Passive Copper Direct-Attach (DAC)
Data Rate: 40GbE Ethernet (4x 10Gb/s)
Length: 4m
Conductor: Copper, twin-axial
Power: Passive (0W)
Lot Quantity: 4 cables
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with Mellanox SwitchX-2 SX1000-series Ethernet switches (SX1036, SX1024, SX1012) and ConnectX-3, ConnectX-3 Pro, and ConnectX-4 Lx 40GbE adapters. Operates as a 40GbE Ethernet link only — this MC2210126-series is the Ethernet-only variant, not the VPI MC2207xxx line. Not compatible with QSFP28 100GbE ports. Not compatible with InfiniBand FDR/EDR fabrics. Not a breakout cable; this is a 1:1 QSFP+ assembly. Fixed 4m length.
Why Choose T.E.S IT-SOLUTIONS
At T.E.S IT-SOLUTIONS every DAC is tested for lane continuity, EEPROM compliance, and connector seating before shipment. We provide expert consultation on Mellanox 40GbE Ethernet cabling, global shipping with 1–3 day handling, and full after-sale support across the lot.