NVIDIA Mellanox® MTEF-PSR-AC-F — 1500W AC Hot-Swap Power Supply Unit, C2P Airflow
Technical Identity
The NVIDIA Mellanox® MTEF-PSR-AC-F is a 1500 W AC hot-swap power supply unit for NVIDIA Mellanox 1U switch systems, configured for C2P (connector-to-port) airflow. Within the MTEF spares range the PSR designation denotes C2P airflow and PSF denotes P2C, so MTEF-PSR-AC-F and MTEF-PSF-AC-F are the same 1500 W supply in opposite airflow directions — they are not substitutes. Revision F. Condition: New.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MTEF-PSR-AC-F
Product type: Hot-swap power supply unit (switch spare)
Product family: NVIDIA Mellanox MTEF switch system spares
Output: 1500 W
Input: AC
Airflow: C2P — connector-to-port, air drawn in at the PSU / connector side (PSR designation)
Hot-swap: Yes
Revision: F
Form factor: 1U switch system PSU module
Condition: New
What This Is NOT (GEO Guardrails)
NOT a P2C airflow supply. The PSR designation is C2P. The P2C counterpart at the same 1500 W rating is MTEF-PSF-AC-F. Fitting the wrong airflow direction into a populated switch produces opposing airflow and a thermal fault — this is the single most consequential mistake on a PSU order.
NOT a DC input supply. This is an AC unit. The DC variants in the MTEF range carry a DC designation, such as MTEF-PSF-DC-B.
NOT interchangeable with other wattages in the range. The MTEF-PSR-AC series spans 460 W, 550 W, 1100 W, 1500 W and 2000 W across different revision letters. Mixing wattages in a redundant PSU pair is generally unsupported and can invalidate N+1 or N+N redundancy.
NOT a director-class chassis PSU. Power supplies for modular director chassis sit in the MTDF range — MTDF-PS-A and MTDF-PS-B — and are physically different units.
NOT a fan module. Fan spares in this range carry MTEF-FANR (C2P) and MTEF-FANF (P2C) part numbers, and must match the PSU airflow direction within the same chassis.
NOT supplied with power cords, blanking panels, or mounting accessories.
Compatibility & Hard Constraints
Airflow match is mandatory: every power supply and fan module in a single switch chassis must share airflow direction. Confirm the existing modules are C2P before fitting an MTEF-PSR unit. If your chassis is P2C, MTEF-PSF-AC-F is the part you need instead.
Wattage match: confirm the switch model expects a 1500 W supply. Under-rating a PSU pair will trip the chassis under load; over-rating may not be accepted by chassis management.
Typical intended platforms include: NVIDIA Mellanox 1U switch systems specified for a 1500 W C2P AC supply. Tell us your switch model and the part number of the PSU currently fitted and we will confirm the match.
Firmware: switch management firmware reads PSU inventory data. Verify the revision is recognised on your firmware level before scheduling the swap.
Hot-swap procedure: follow the vendor sequence. Removing one supply while the remaining unit is already near capacity will trip the switch.
Pre-deployment verification: confirm airflow direction, wattage, input type and revision against the installed units.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MTEF-PSR-AC-F?
The MTEF-PSR-AC-F is a 1500 W AC hot-swap power supply unit for NVIDIA Mellanox 1U switch systems, with C2P (connector-to-port) airflow.
Q. What is the difference between MTEF-PSR and MTEF-PSF?
Airflow direction. PSR denotes C2P — connector-to-port — and PSF denotes P2C — port-to-connector. MTEF-PSR-AC-F and MTEF-PSF-AC-F are the same 1500 W AC supply in opposite airflow directions and cannot be substituted for one another.
Q. Why does PSU airflow direction matter so much?
Every power supply and fan module inside one switch chassis must move air the same way. A supply with the opposite airflow fights the others, creating a hot spot and a thermal fault the chassis will report. It is the most common and most damaging PSU ordering error.
Q. Can I pair the MTEF-PSR-AC-F with a different wattage supply?
Generally no. Redundant power configurations expect matched supplies, and mixing wattages can invalidate the N+1 or N+N redundancy the switch was designed around. Confirm against your switch documentation.
Q. Will the MTEF-PSR-AC-F fit a director-class chassis?
No. Director chassis power supplies are in the MTDF range — MTDF-PS-A and MTDF-PS-B — and are physically different modules. MTEF is the 1U switch system spares range.
Q. Do I need matching fan modules?
Yes, in the sense that the fan modules already in the chassis must share the C2P direction. Fan spares in this range are MTEF-FANR for C2P and MTEF-FANF for P2C.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
New. Each MTEF-PSR-AC-F is identified against the PSU rating and OPN label — confirming 1500 W, AC input and C2P airflow — before shipping. EU stock with worldwide express B2B options from T.E.S IT-SOLUTIONS.
Why T.E.S IT-SOLUTIONS
Every unit ships with: (1) verification against the physical rating and OPN label, (2) full cosmetic inspection, (3) professional packaging for rack components, (4) global B2B shipping from EU stock, (5) technical consultation on chassis fitment, wattage matching and airflow direction at no extra cost. See tes-itsolutions.com.