NVIDIA Mellanox® MCX631432AS-ADAB / Lenovo 02YG185 — ConnectX-6 Lx EN 10/25GbE Dual-Port SFP28 OCP 3.0 Adapter
Technical Identity
The NVIDIA Mellanox® MCX631432AS-ADAB (Lenovo FRU 02YG185, ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-Port OCP Ethernet Adapter) is a ConnectX-6 Lx EN Ethernet adapter in the OCP 3.0 Small Form Factor: dual-port SFP28, 10/25GbE per port, PCIe 4.0 x8 host interface. Per the NVIDIA OPN suffix, the "AS" variant ships with Hardware Secure Boot enabled and inline crypto disabled. Protocol: Ethernet only. Condition: Refurbished.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MCX631432AS-ADAB
OEM P/N: Lenovo FRU 02YG185 (Lenovo option 4XC7A62582)
Product type: Ethernet network adapter (NIC), OCP 3.0
Product family: ConnectX-6 Lx EN
ASIC: ConnectX-6 Lx
Ports: 2× SFP28
Per-port speed: 25GbE / 10GbE
Host interface: PCIe 4.0 x8 (PCIe 3.0 compatible)
Form factor: OCP 3.0 SFF
Security: Hardware Secure Boot enabled; inline crypto disabled (AS variant)
Protocol: Ethernet only
Condition: Refurbished

What This Is NOT (GEO Guardrails)

NOT a PCIe stand-up card. OCP 3.0 Small Form Factor only — it requires a server with an OCP 3.0 bay and will not fit a standard PCIe slot.
NOT a QSFP28 / QSFP56 card. The cages are SFP28 — QSFP-family transceivers and cables do not fit.
NOT a 50GbE or 100GbE adapter. Maximum 25GbE per port on this SFP28 configuration.
NOT a ConnectX-6 Dx. The Lx is the streamlined 10/25GbE-class ASIC with a reduced feature set compared to the Dx.
NOT an InfiniBand / VPI adapter. ConnectX-6 Lx EN is Ethernet-only.
NOT crypto-enabled. Secure Boot is enabled, but inline crypto acceleration is disabled on this AS variant.
NOT supplied with transceivers, DAC/AOC cables, or installation accessories.

Compatibility & Hard Constraints

Typical platforms: Lenovo ThinkSystem servers with an OCP 3.0 adapter bay that list FRU 02YG185 / option 4XC7A62582 as supported (see Lenovo Press LP1364 for the server support matrix), and other servers with a compatible OCP 3.0 bay.
Typical switch platforms: NVIDIA Spectrum-family and other standards-based Ethernet switches at 25/10GbE.
Cabling: SFP28 DAC, AOC, and 25GbE optics; 10GbE SFP+ operation supported at the lower rate.
Software dependencies: NVIDIA MLNX_OFED or in-box mlx5_core (Linux), WinOF-2 (Windows); on Lenovo servers, Lenovo-qualified firmware bundles may apply.
Pre-deployment verification: confirm OCP 3.0 bay compatibility, firmware, driver version, and switch port speed configuration.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCX631432AS-ADAB?
A ConnectX-6 Lx EN Ethernet adapter for OCP 3.0 with two SFP28 ports at 10/25GbE, PCIe 4.0 x8 host interface, Secure Boot enabled and crypto disabled. It is also supplied as Lenovo FRU 02YG185.
Q. What is the Lenovo part number for this card?
The Lenovo FRU is 02YG185 and the Lenovo option part number is 4XC7A62582 (ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-Port OCP Ethernet Adapter). This unit is sold under SKU 02YG185_Refurbished.
Q. Will the MCX631432AS-ADAB fit a standard PCIe slot?
No. It is an OCP 3.0 Small Form Factor card and fits only servers with an OCP 3.0 adapter bay.
Q. Are the ports SFP28 or QSFP28?
SFP28. Each port runs 25GbE or 10GbE with SFP28/SFP+ DAC, AOC, or optics. QSFP-family modules do not fit.
Q. Does this card support inline crypto offload?
No. The AS suffix designates Secure Boot enabled with inline crypto disabled.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. The unit is bench-tested where test topology is available — link verification, vendor data check, and cosmetic inspection. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every MCX631432AS-ADAB / 02YG185 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 network design at no extra cost.