NVIDIA Mellanox MTEF-PSR-AC-D 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-D pairs with the matching '-D' airflow fan tray to maintain consistent chassis cooling direction. This is NOT a switch line card and NOT compatible with all Mellanox chassis — it must be matched to one of the supported switch families listed below. This is a refurbished unit, fully tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MTEF-PSR-AC-D delivers 550W of regulated DC power to its host switch backplane from a wide-range AC input. The PSU is hot-swappable, allowing 1+1 redundant chassis to remain online during replacement. A keyed connector and color-coded handle prevent accidental insertion of an opposite-airflow PSU into a chassis configured for one direction. The IEC C13/C14 inlet accepts standard data-center power cords.
Deployment & Use Cases
RMA replacement of failed PSU slots in Mellanox EDR/100GbE switch chassis. Field upgrade of single-PSU chassis to 1+1 redundant configuration. Spare-pool stocking for data centers operating large fleets of SB7700/SB7800/SN2410/SN2700 switches. Lab and pre-production environments running Mellanox top-of-rack switches.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MTEF-PSR-AC-D
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: '-D' (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
The '-D' and '-I' 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 '-D' and '-I' will cause a chassis airflow alarm and may force the switch into reduced operating state. Confirm the airflow direction of your existing fan trays before ordering. Not compatible with chassis outside the listed switch families. Not a DC-input PSU; for DC power use the MTEF-PSR-DC-D 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.