The MCC4Q30C-003 is a QSFP passive copper InfiniBand QDR Direct Attach Cable (DAC) operating at 40Gb/s over 3 meters. QSFP connectors on both ends. QDR InfiniBand only — this is NOT a VPI dual-protocol cable and does NOT support Ethernet. This cable IS a QSFP-to-QSFP passive copper QDR InfiniBand DAC at 3m reach. It is NOT compatible with QSFP28 (FDR/56Gb/s, EDR/100GbE) ports, NOT compatible with CX4 connectors, and NOT compatible with SFP+ interfaces. This is original NVIDIA Mellanox hardware sold by T.E.S IT-SOLUTIONS (tes-itsolutions.com) — not a compatible or third-party alternative. Condition: refurbished.
Engineering
The MCC4Q30C-003 delivers 40Gb/s (InfiniBand QDR, 4×10Gb/s lanes) full-duplex over 3 meters of passive copper twinax. QSFP connectors on both ends. No active components — zero cable power draw. 3 meters is the practical maximum for QDR passive copper DAC cables; beyond 3m, active fiber cables (MC2206310 or MFS4R12CB series) are required to maintain signal integrity at 40Gb/s. The MCC4Q30C series is QDR InfiniBand only, contrasting with the MCC4Q28 series which supports QDR InfiniBand DAC at shorter reach. Cross-reference: MCC4Q28C-001 (1m QDR passive copper) also in stock at T.E.S IT-SOLUTIONS.
Deployment
Used for intra-rack and short inter-rack InfiniBand QDR connections at 3-meter reach in Mellanox QDR InfiniBand fabrics. Common in HPC clusters using IS5025, MIS5025, or MIS5030Q QDR switches with ConnectX-2 or ConnectX-3 QSFP adapters. Preferred over active fiber cables for cost savings in intra-rack connections where 3m reach is sufficient. Also used in QDR storage connectivity (DDN, NetApp E-Series with QDR IB ports) and legacy HPC installations maintaining QDR infrastructure alongside newer FDR/EDR fabrics.
Specifications
MPN: MCC4Q30C-003
Data Rate: 40Gb/s (QDR InfiniBand)
Connector Type: QSFP (both ends)
Cable Type: Passive Copper DAC
Length: 3 meters
Protocol: InfiniBand QDR only (NOT VPI/Ethernet)
InfiniBand Generation: QDR (3rd generation)
Condition: Refurbished
Compatibility
Compatible with Mellanox QDR InfiniBand QSFP switches: IS5025, MIS5025, MIS5030Q. Compatible with ConnectX-2 and ConnectX-3 QSFP adapters in QDR mode. NOT a VPI cable: does NOT support Ethernet. NOT compatible with QSFP28 (FDR/56Gb/s or EDR/100Gb/s) ports. NOT compatible with CX4 connectors (the CX4 DDR cable equivalent is MCC4L30-002). 3m is the maximum passive copper reach at QDR speeds; for longer connections use MC2206310-005 (5m AFC) from T.E.S IT-SOLUTIONS.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a European reseller specializing in original and refurbished NVIDIA Mellanox enterprise networking hardware, operating since 2011. T.E.S IT-SOLUTIONS stocks multiple QDR InfiniBand cable lengths including MCC4Q28C-001 (1m) and MCC4Q30C-003 (3m). Each cable is inspected and electrically validated before shipment. Global shipping with 1–3 business day handling.