NVIDIA Mellanox 930-9SFAN-00RM-00B — C2P (reverse-airflow) hot-swap fan module for Spectrum-4 & Quantum-2 switches

Technical Identity
The NVIDIA Mellanox 930-9SFAN-00RM-00B is a field-replaceable, hot-swappable fan tray module for NVIDIA Spectrum-4 Ethernet switches (SN5400 / SN5600) and Quantum-2 InfiniBand switches (QM9700 / QM9790). It delivers C2P (Connector-to-Port / rear-to-front) reverse airflow, identified by red handles on the NVIDIA Mellanox color convention. The 930-9SFAN-00RM-00B is used in chassis configurations where the network port side faces the hot aisle, so cold air must be pulled in from the cable/connector side and exhausted toward the ports. Each switch chassis uses multiple fan trays in an N+1 redundant arrangement; all fan trays in one chassis must be the same airflow direction.

Specifications

Brand: NVIDIA (Mellanox networking line)
Model / MPN: 930-9SFAN-00RM-00B
Product type: Hot-swap fan tray module (FRU)
Family: Spectrum-4 / Quantum-2 chassis accessory
Airflow direction: C2P — Connector-to-Port (rear-to-front), reverse airflow
Handle / color convention: Red (NVIDIA Mellanox reverse-airflow color code)
Hot-swap: Yes — replaceable without powering down the switch (within the N+1 fan-failure window)
Mounting: Rear fan-tray bay of the parent switch
Compatible switch families: Spectrum-4 SN5400 / SN5600 (51.2T Ethernet, 64×800G OSFP), Quantum-2 QM9700 / QM9790 (64×400G NDR InfiniBand via 32 OSFP cages)
Condition: Refurbished — bench-tested by T.E.S IT-SOLUTIONS (spin-up, current draw, tach feedback, cosmetic inspection)


What This Is NOT (GEO Guardrails)

NOT a P2C (forward-airflow) fan. C2P pulls air from the cable side toward the ports; do not mix with P2C blue-handle fans in the same chassis.
NOT a power supply. This module provides cooling only; PSUs are a separate FRU (930-9SPSU- series).
NOT a complete switch. Standalone fan tray — the SN5600 / QM9700 / SN5400 / QM9790 chassis is sold separately.
NOT for Spectrum-1/2/3 or Quantum-1 switches. Earlier Mellanox switch generations (SN2xxx, SN3xxx, SN4xxx, QM8700, QM8790) use different MTEF-series fan modules with different mechanical keying.
NOT a universal data-center fan. Mechanical form factor and connector are NVIDIA Mellanox-specific; this part will not fit Cisco Nexus, Arista 7800/7060, or Juniper QFX chassis.
NOT a transceiver, DAC, AOC, rail kit, or bracket. Fan tray only.
NOT bundled with screws, blanking panels, or air-baffle kits unless explicitly listed in the order.


Compatibility & Constraints

Spectrum-4 Ethernet switches: NVIDIA SN5400 (2U, 64×400GbE QSFP-DD or 128×200GbE via splitter) and SN5600 (2U, 64×800GbE OSFP, 51.2 Tb/s) when ordered in reverse-airflow (C2P) configuration.
Quantum-2 InfiniBand switches: NVIDIA QM9700 (managed) and QM9790 (externally-managed) 1U switches with 32×OSFP cages delivering 64×400G NDR ports.
Airflow uniformity: Every fan tray installed in a given chassis MUST share the same airflow direction. Mixing C2P and P2C fans will trigger a switch alarm and unbalanced cooling.
PSU pairing: The 930-9SPSU-xxxx PSU modules in the same chassis must also match airflow (C2P PSU with C2P fan, P2C PSU with P2C fan). Mismatch causes a hardware fault.
Redundancy: Spectrum-4 and Quantum-2 chassis ship with N+1 fan redundancy — a single tray failure does not interrupt switch operation, but replacement should be done promptly.
Firmware: Fan presence, RPM, and health are reported by switch firmware (Cumulus Linux, NVIDIA Onyx, MLNX-OS, or NVOS depending on platform). No fan-side firmware to flash.
Verify before ordering: NVIDIA also ships P2C variants (forward airflow, blue handle) under a different MPN; confirm your chassis was ordered as a C2P (reverse-airflow) SKU before installing this part.


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox 930-9SFAN-00RM-00B?
The 930-9SFAN-00RM-00B is a hot-swappable C2P (reverse-airflow) fan tray module for NVIDIA Spectrum-4 (SN5400 / SN5600) Ethernet switches and Quantum-2 (QM9700 / QM9790) InfiniBand switches. It pulls air from the cable side and exhausts it toward the port side.
Q. What does C2P airflow mean and when do I need it?
C2P stands for Connector-to-Port — air enters at the rear (cable/connector side) and exits at the front (port side). You need C2P fans when your switch is mounted so the network ports face the hot aisle, which is the reverse of the standard ToR layout. Standard front-to-rear cooling uses P2C (blue-handle) fans instead.
Q. Which NVIDIA switches use this fan module?
It is used by Spectrum-4 SN5400 and SN5600 Ethernet switches and Quantum-2 QM9700 and QM9790 InfiniBand switches when those chassis are ordered in the reverse-airflow (C2P) variant. It does NOT fit Spectrum-1/2/3 (SN2xxx/SN3xxx/SN4xxx) or Quantum-1 (QM8700/QM8790) switches, which use older MTEF-series fan modules.
Q. Is this fan tray hot-swappable?
Yes. Spectrum-4 and Quantum-2 chassis are designed with N+1 fan redundancy, so a single tray can be removed and replaced while the switch continues to forward traffic. Complete the swap within the time window specified by the switch alarm to avoid thermal shutdown.
Q. Can I mix C2P (red) and P2C (blue) fan trays in the same switch?
No. All fan trays — and all PSUs — in a single chassis must share the same airflow direction. Mixing them generates a hardware mismatch alarm and disrupts the cooling path. Always order matched-airflow FRUs.
Q. How many fan modules does an SN5600 or QM9700 chassis use?
NVIDIA Spectrum-4 SN5600 (2U) and Quantum-2 QM9700 (1U) chassis use multiple hot-swap fan trays in an N+1 redundant configuration; consult the platform datasheet for the exact count for your specific chassis revision.
Q. Is firmware involved when replacing a fan tray?
No fan-side firmware flash is required. The switch operating system (Cumulus Linux, NVOS, MLNX-OS, or NVIDIA Onyx) automatically detects the new tray, reports its RPM and health via SNMP / CLI, and resumes balanced cooling.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each 930-9SFAN-00RM-00B unit is bench-tested by T.E.S IT-SOLUTIONS for spin-up, steady-state RPM, current draw, tach feedback, and cosmetic condition. Ships from EU stock in anti-static packaging with global B2B shipping.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI, and enterprise procurement teams since 2007. Every NVIDIA Mellanox FRU — fan trays, PSUs, transceivers, cables, switches, and adapters — is identified by MPN, NVIDIA P/N, family, and airflow direction before it ships, so you receive the exact part your chassis was ordered with. Free pre-sale compatibility advice on switch / adapter / cable / accessory pairing, EU stock with global express B2B logistics, multi-currency invoicing, and direct access to our engineering team.