NVIDIA Mellanox MTEF-PSR-AC-I 550W AC Power Supply Unit: This is a hot-swappable 550W AC field-replaceable power supply unit (FRU) for NVIDIA Mellanox switch chassis. The MTEF-PSR-AC-I is the inverted-airflow counterpart to the MTEF-PSR-AC-D and pairs with the matching '-I' airflow fan tray. This is NOT interchangeable with the '-D' variant in the same chassis. This is a refurbished unit, fully tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MTEF-PSR-AC-I delivers 550W of regulated DC power to its host switch backplane from a wide-range AC input. It is hot-swappable, allowing 1+1 redundant chassis to remain online during replacement. The IEC C13/C14 inlet accepts standard data-center power cords. The '-I' suffix denotes the inverted airflow direction relative to the '-D' SKU; chassis with cold aisle behind the connector cage typically use the '-I' airflow, while front-port-facing-cold-aisle chassis use '-D'. Confirm against the matching FRU labels on existing fan trays before ordering.
Deployment & Use Cases
RMA replacement of failed PSU slots in Mellanox EDR/100GbE switch chassis configured for inverted airflow. Field upgrade of single-PSU chassis to 1+1 redundancy. Spare-pool stocking for data centers operating fleets of SB7700/SB7800/SN2410/SN2700 switches with reverse-airflow racks. Hot-aisle/cold-aisle conversion projects where chassis airflow is being reversed.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MTEF-PSR-AC-I
Type: Switch chassis power supply unit (FRU)
Power Output: 550W
Input: AC, IEC C13/C14 inlet
Hot-Swap: Yes (when chassis is in 1+1 redundant configuration)
Airflow Variant: '-I' inverted (must match the chassis fan tray airflow direction)
Compatible Switch Families: SB7700, SB7800, SB7890, SN2410, SN2700, SN2740, SX1410, SX1710, SX6710
Power Cord: Included (region-appropriate)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
'-I' and '-D' airflow variants are NOT interchangeable in the same chassis. All PSUs and fan trays in a single switch must share the same airflow direction. Mixing '-I' and '-D' will trigger a chassis airflow mismatch alarm. Confirm fan tray airflow before ordering. Not compatible with switches outside the listed families. Not a DC-input PSU; for DC power use the MTEF-PSR-DC-I variant.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every refurbished PSU under load before shipment and provides chassis-airflow guidance to prevent mismatched orders. Global shipping with 1–3 day handling time.