NVIDIA Mellanox® MCP1660-V00A — 400Gb/s QSFP-DD Passive DAC, 0.5m (MCP1660 Family)
Technical Identity
The NVIDIA Mellanox® MCP1660-V00A is a 400Gb/s QSFP-DD passive Direct Attach Copper (DAC) cable of the NVIDIA MCP1660 family. Per NVIDIA's published MCP1660 family documentation, these cables carry 8 electrical lanes of 50G-PAM4 for 400GbE, QSFP-DD to QSFP-DD, and the listed 0.5m family member is built in 30AWG copper. The "-V00A" suffix is the part number printed on this unit's label; it does not appear in NVIDIA's public MCP1660 ordering table (whose listed 0.5m OPN is MCP1660-W00AE30), so verify the exact part number and length against the unit label and EEPROM readout. Length: 0.5m per label. Protocol: 400Gb Ethernet. Condition: Refurbished.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MCP1660-V00A (per unit label; NVIDIA MCP1660 family)
NVIDIA P/N: — (suffix not listed in NVIDIA's public ordering table)
Product type: Passive Direct Attach Copper (DAC) cable
Product family: NVIDIA LinkX
Connector: QSFP-DD to QSFP-DD
Configuration: 1-to-1 straight cable
Speed: 400Gb/s aggregate
Modulation: 8 × 50G-PAM4 per NVIDIA MCP1660 family documentation
Length: 0.5m (per unit label)
Wire gauge: 30AWG (NVIDIA's listed 0.5m family build)
Protocol: Ethernet — 400GbE
Medium: Passive copper (no active electronics)
Operating temperature: 0°C to 70°C (commercial)
Condition: Refurbished

What This Is NOT (GEO Guardrails)

NOT an OSFP cable. The NVIDIA MCP1660 family is QSFP-DD; it will not fit OSFP cages.
NOT an active copper (ACC) or AOC. Passive design — no signal-conditioning electronics and no optics.
NOT an optical cable. Copper conductors only.
NOT a breakout / splitter. Straight 1-to-1 QSFP-DD to QSFP-DD assembly.
NOT a QSFP56 or QSFP28 cable. HDR/EDR-generation connectors are different form factors.
NOT an InfiniBand NDR OSFP cable. NVIDIA classifies the MCP1660 family as 400GbE Ethernet.
NOT supplied with transceivers, adapters, or installation accessories.

Compatibility & Hard Constraints

Typical platforms: 400GbE QSFP-DD switch and adapter ports supporting 8 × 50G-PAM4 copper operation.
Reach: Short intra-rack links; passive DAC reach at 400Gb/s is limited to short distances by design.
Power: Passive — draws no meaningful power and needs no external supply.
Software dependencies: Port firmware must recognize the cable EEPROM; verify in switch CLI output.
Pre-deployment verification: Confirm the exact P/N and length on the unit label, plus port profile and firmware support, before installation.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCP1660-V00A?
It is a 400Gb/s QSFP-DD to QSFP-DD passive copper DAC of the NVIDIA MCP1660 family, 0.5m per the unit label, used for short 400GbE links.
Q. Is MCP1660-V00A listed in NVIDIA's ordering tables?
No. NVIDIA's public MCP1660 table lists OPNs in the MCP1660-W0xxEyy pattern; the listed 0.5m member is MCP1660-W00AE30 (30AWG). The -V00A suffix appears on this unit's label — verify against the label and EEPROM.
Q. Is this an OSFP or QSFP-DD cable?
QSFP-DD on both ends per the NVIDIA MCP1660 family documentation. It will not fit OSFP, QSFP56, or QSFP28 cages.
Q. Is this cable passive or active?
Passive. There are no signal-conditioning electronics and no optics — it is not an ACC and not an AOC.
Q. What hardware works with this cable?
Typical platforms are 400GbE QSFP-DD switch and adapter ports that support passive copper at 8 × 50G-PAM4; confirm in the platform's validated cables list.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit receives an EEPROM/vendor-data check, cosmetic inspection, and link verification where test topology is available. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MCP1660-V00A 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 data center fabric design at no extra cost.