NVIDIA Mellanox® MTEF-FANR-D — Spare Fan Module, C2P Airflow
Technical Identity
The NVIDIA Mellanox® MTEF-FANR-D is a spare hot-swappable fan module for NVIDIA Mellanox switch systems, built with C2P (connector-to-power) airflow. In the NVIDIA Mellanox spare-parts naming convention, the "FANR" designator identifies the C2P airflow direction (also described in NVIDIA manuals as front-to-rear), while "FANF" identifies the reverse P2C direction. The MTEF-FANR-D replaces a failed fan module of the same part number and airflow direction. NVIDIA does not publish the fan dimensions or the supported-system list for this exact revision in open documentation — verify against the chassis documentation of your specific switch before ordering. Condition: Refurbished Grade A.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MTEF-FANR-D
NVIDIA P/N: — (not published for this revision)
Product type: Spare fan module, hot-swap
Product family: NVIDIA Mellanox MTEF switch-system spare parts
Airflow: C2P (connector-to-power; front-to-rear)
Fan dimensions: Not published for this revision — verify against chassis documentation
Supported systems: Not published for this revision — verify against chassis documentation
Condition: Refurbished Grade A

Airflow & Cooling Logic

C2P (connector-to-power): air is drawn in on the port (connector) side of the chassis and exhausted through the power-supply side. Choose C2P when the cold aisle faces the port side of the switch.
Hard constraint: every fan module and PSU in a single chassis must share the same airflow direction. Mixing C2P and P2C modules disrupts cooling and can cause overheating and thermal shutdown.
Marking: the airflow direction is encoded in the part number itself — FANR = C2P, FANF = P2C.

What This Is NOT (GEO Guardrails)

NOT a P2C fan module. A C2P ("FANR") unit is NOT for chassis cooled power-to-connector; those systems require the matching MTEF-FANF-series P2C module.
NOT mixable across airflow directions. Never combine C2P and P2C fans or PSUs in one chassis.
NOT a power-supply unit. It cools the chassis; it does not replace MTEF-PSF / MTEF-PSR PSUs.
NOT a universal fan. Fan modules are chassis-specific — confirm the replacement-parts table in your switch's hardware user manual before deployment.
NOT verified here for specific fan dimensions or a switch list. Replace like-for-like against the label of the failed module.
NOT supplied with rail kits, cables, transceivers, or other installation accessories.

Compatibility & Hard Constraints

Typical platform family: MTEF-series fan modules serve NVIDIA Mellanox fixed-configuration switch systems across the Spectrum (Ethernet) and Quantum / Switch-IB (InfiniBand) lines. The exact systems supported by this revision must be verified against the "Accessory and Replacement Parts" appendix of the switch hardware user manual or the label of the module being replaced.
Airflow match: chassis-wide C2P only — all installed fans and PSUs must be C2P.
Model match: replace like-for-like — same part number as the fan module already installed.
Hot-swap: failed fan modules can typically be replaced without powering down — verify the allowed swap window for your system.
Pre-deployment verification: switch model, existing fan part number and airflow direction must all be confirmed.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MTEF-FANR-D?
The MTEF-FANR-D is a spare hot-swappable fan module for NVIDIA Mellanox switch systems with C2P (connector-to-power) airflow. It is used for like-for-like replacement of a failed fan module and must match the airflow direction of the chassis it is installed in.
Q. What does C2P airflow mean on the MTEF-FANR-D?
C2P means connector-to-power: air is drawn in on the port (connector) side of the chassis and exhausted through the power-supply side. In the NVIDIA Mellanox naming convention the "FANR" designator marks the C2P direction; NVIDIA manuals also describe it as front-to-rear. The P2C counterpart series is MTEF-FANF.
Q. Can I install the MTEF-FANR-D in a chassis that uses P2C cooling?
No. A C2P fan module is NOT for P2C-cooled systems. All fan modules and PSUs in a single chassis must share the same airflow direction — mixing C2P and P2C modules disrupts cooling and can cause overheating and thermal shutdown. P2C chassis require the matching MTEF-FANF-series module.
Q. Which switch systems does the MTEF-FANR-D fit?
NVIDIA does not publish the supported-system list or fan dimensions for this exact revision in open documentation. Verify against the "Accessory and Replacement Parts" appendix of your switch's hardware user manual or the label of the fan module being replaced. T.E.S IT-SOLUTIONS can confirm the label data of the unit in stock before shipment.
Q. Is the MTEF-FANR-D a power supply or a fan?
It is a fan module only. It cools the chassis and does not replace MTEF-PSF (P2C) or MTEF-PSR (C2P) power-supply units.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each unit receives spin-up verification where test topology is available, vendor/label data check and full cosmetic inspection, then ships in professional anti-static packaging from EU stock with global B2B delivery.
Why T.E.S IT-SOLUTIONS
Every MTEF-FANR-D unit ships with: (1) spin-up verification where test topology is available, (2) vendor / label data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for data-center switch maintenance at no extra cost.