NVIDIA Mellanox® MTEF-FANR-M — 40x40mm Fan Module, C2P Airflow, for SN4700 / SN4700D
Technical Identity
The NVIDIA Mellanox® MTEF-FANR-M (NVIDIA P/N 930-9BFAN-00JB-000) is a spare hot-swappable 40 x 40 mm fan module with C2P (connector-to-power) airflow for NVIDIA Spectrum-3 SN4700 and SN4700D 400GbE switch systems. NVIDIA's official replacement-parts description: "NVIDIA fan module, 40 x 40 [mm], C2P airflow" (SN4000 Hardware User Manual, Accessory and Replacement Parts). The P2C counterpart for the same systems is the MTEF-FANF-M (930-9BFAN-00IX-000). Condition: Refurbished Grade A.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MTEF-FANR-M
NVIDIA P/N: 930-9BFAN-00JB-000
Product type: Spare fan module, hot-swap
Product family: NVIDIA Spectrum-3 SN4000 switch-system spare parts
Fan dimensions: 40 x 40 mm
Airflow: C2P (connector-to-power; front-to-rear)
Supported systems: SN4700, SN4700D (per NVIDIA SN4000 hardware user manual)
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; P2C SN4700/SN4700D systems require the MTEF-FANF-M (930-9BFAN-00IX-000).
NOT for SN4600 or SN4600C. The SN4600 uses the 80 x 80 mm MTEF-FANR-I; the SN4600C uses the MTEF-FANR-G module with shutters.
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 supplied with rail kits, cables, transceivers, or other installation accessories.

Compatibility & Hard Constraints

Typical platforms: NVIDIA Spectrum-3 SN4700 and SN4700D 1U 400GbE switch systems, per the NVIDIA SN4000 Hardware User Manual replacement-parts table.
Airflow match: chassis-wide C2P only — all installed fans and PSUs must be C2P.
Model match: replace like-for-like — confirm the existing module is MTEF-FANR-M / 930-9BFAN-00JB-000 before ordering.
Hot-swap: fan modules can be replaced in a running system — verify the allowed swap window for your configuration.
Pre-deployment verification: switch model, existing fan part number and chassis airflow direction must all be confirmed.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MTEF-FANR-M?
The MTEF-FANR-M is a spare hot-swappable 40 x 40 mm fan module with C2P (connector-to-power) airflow for NVIDIA Spectrum-3 SN4700 and SN4700D switch systems. It is listed in the NVIDIA SN4000 hardware user manual as the C2P replacement fan for these systems.
Q. What is the NVIDIA ordering part number?
The NVIDIA ordering P/N is 930-9BFAN-00JB-000. The legacy marketing model number is MTEF-FANR-M.
Q. What does C2P airflow mean on the MTEF-FANR-M?
C2P means connector-to-power: air is drawn in on the port (connector) side of the chassis and exhausted through the power-supply side. NVIDIA manuals also describe it as front-to-rear. The "FANR" designator marks the C2P direction.
Q. Can I install the MTEF-FANR-M in a P2C-cooled SN4700?
No. A C2P fan is NOT for P2C-cooled chassis. An SN4700 running P2C cooling requires the MTEF-FANF-M (930-9BFAN-00IX-000) P2C counterpart. Never mix C2P and P2C fans or PSUs in the same chassis — mixed airflow causes overheating and thermal shutdown.
Q. Does the MTEF-FANR-M fit the SN4600 or SN4600C?
No. Per the NVIDIA SN4000 manual, the SN4600 uses the 80 x 80 mm MTEF-FANR-I and the SN4600C uses the MTEF-FANR-G fan module with shutters. The MTEF-FANR-M is the 40 x 40 mm module for SN4700 and SN4700D only.
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-M 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.