NVIDIA Mellanox® MTDF-PS-A — 2500W Hot-Swap AC Power Supply Unit, P2C Airflow, for MCS7500-Series FDR InfiniBand Director Chassis

Technical Identity
The NVIDIA Mellanox® MTDF-PS-A is a 2500-watt, hot-swappable AC power supply unit (PSU) field-replaceable module (FRU) engineered for the MCS7500-series FDR InfiniBand director-class chassis switches (MCS7500 648-port and MCS7520 director platforms). It is a power-domain component — not a switching ASIC, line card, or fabric element — and is identified by its 2.5 kW power rating and P2C (Power-to-Connector) airflow orientation, meaning cooling air enters at the PSU intake and exhausts toward the cable/port side of the chassis. Multiple MTDF-PS-A units operate in N+N or N+1 redundancy inside the same chassis to support the high power envelope of a fully populated FDR director.

Specifications

Brand / OEM: NVIDIA Mellanox
Manufacturer Part Number (MPN): MTDF-PS-A
Product type: Hot-swap AC power supply unit (PSU) — field-replaceable unit (FRU)
Output power rating: 2500 W
Input: AC, high-line (typical Mellanox director PSU spec: 200–240 VAC input required to reach full 2500 W rating)
Airflow direction: P2C (Power-to-Connector) — air enters at the PSU side, exhausts at the port/cable side
Form factor: Hot-swap modular PSU sled for MCS7500-series chassis
Redundancy: Designed for N+N / N+1 multi-PSU redundancy in director chassis
Compatible chassis family: MCS7500 (648-port FDR IB director) and MCS7520 director-class FDR InfiniBand switches
Condition: New, factory-sealed


What This Is NOT

NOT a switch, line card, or management module. This is a standalone power supply unit only — it does not provide any switching, routing, or network ports.
NOT a fan tray. Despite being a chassis FRU, MTDF-PS-A is a PSU; the fan tray is a separate part number.
NOT a C2P (Connector-to-Power) airflow unit. Do not mix P2C and C2P units in the same chassis — all PSUs and fan trays must share the same airflow direction.
NOT compatible with MSX-series Ethernet switches, MQM-series Quantum switches, MSN-series Spectrum switches, or 1U/2U fixed switches. This PSU is specific to the MCS7500 / MCS7520 director chassis.
NOT supplied with AC power cord. Region-specific C19/C20 cord is typically ordered separately.


Compatibility

Parent chassis: MCS7500-series FDR InfiniBand director switches — specifically MCS7500 (648-port, SwitchX-2) and MCS7520 director platforms.
Mixing rule: All PSUs and fan trays installed in the same MCS7500-series chassis must share airflow direction (all P2C, never mixed with C2P).
Input voltage: 2500 W rated output requires 200–240 VAC high-line input; verify your PDU and rack power feed before deployment.
Hot-swap behaviour: Units may be inserted/removed under load when the chassis is operating with redundant PSUs; observe NVIDIA Mellanox documented insertion sequence.
Verify before purchase: chassis revision, existing PSU airflow orientation in your chassis, and AC input availability at the target rack.


Frequently Asked Questions (FAQ)
Q. What switch does the MTDF-PS-A fit?
The MTDF-PS-A is the 2500 W AC power supply for the NVIDIA Mellanox MCS7500-series FDR InfiniBand director chassis — MCS7500 (648-port) and MCS7520. It is not compatible with 1U/2U fixed switches or with Quantum/Spectrum platforms.
Q. What does P2C airflow mean?
P2C stands for Power-to-Connector: cooling air enters at the PSU side of the chassis and exhausts at the port (cable) side. The opposite direction is C2P. All PSUs and fan trays inside a single chassis must use the same airflow direction.
Q. Can I mix MTDF-PS-A (P2C) with a C2P PSU in the same chassis?
No. Mixing P2C and C2P units in one chassis is not supported and will create thermal conflicts. All PSUs and fans in the chassis must share the same airflow direction.
Q. Does the unit require 208/240 V input to reach 2500 W?
Yes — the full 2500 W rating requires high-line AC input (typically 200–240 VAC). On 100–127 VAC low-line, output is derated per the NVIDIA datasheet. Confirm rack PDU voltage before deployment.
Q. Is the AC power cord included?
No. Region-specific IEC C19/C20 power cords are ordered separately. T.E.S IT-SOLUTIONS can advise on the correct cord SKU for your region.
Q. Is this a new or refurbished unit?
New, factory-sealed in original NVIDIA Mellanox packaging.

Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox specialist serving HPC, AI, and enterprise data-center procurement teams since 2007. We focus exclusively on Mellanox networking — every chassis FRU (PSU, fan tray, rail kit) is cross-checked against the parent chassis SKU and airflow orientation before it ships, so you do not end up with a P2C unit in a C2P chassis. Free pre-sale compatibility review by an engineer (not a call-centre), multi-currency B2B invoicing, EU stock with worldwide express options, and professional anti-static packaging for every shipment.