NVIDIA Mellanox® MTEF-PSR-AC-E — 550W AC PSU FRU for Spectrum Ethernet Switches
Technical Identity
The NVIDIA Mellanox® MTEF-PSR-AC-E is a 550-watt hot-swappable AC power supply unit (PSU) field-replaceable unit (FRU) designed for NVIDIA Mellanox Spectrum™ and Spectrum-2™ family Ethernet switches, including the SN2010, SN2100, SN2410, SN2700, SN3420, SN3700 and SN3700C platforms that ship with the -E airflow orientation. The -E suffix denotes power-side intake / port-side exhaust airflow (P2C, also referred to as "reverse" or "back-to-front" on switches with the PSU at the rear), matching switches whose fans push air from the PSU/management side toward the QSFP/SFP connector side. Two PSUs install per chassis for N+N redundancy, and the module is hot-swappable without interrupting data-plane traffic. Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS.
Specifications

OEM: NVIDIA (Mellanox)
Manufacturer Part Number (MPN): MTEF-PSR-AC-E
Product type: Field-Replaceable Unit (FRU) — AC Power Supply
Rated output power: 550 W
Input: 100–240 V AC, 50/60 Hz (universal auto-ranging)
Efficiency class: 80 PLUS Platinum-class (per NVIDIA Mellanox spec)
Airflow direction: Power-to-Connector (P2C) — power-side intake, port-side exhaust
Form factor: Mellanox switch PSU module slot (slide-in, hot-swappable)
Redundancy: N+N (two PSUs per chassis)
Color coding: Standard P2C handle (matches -E airflow fans)
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS

What This Is NOT

NOT a complete switch. This is a standalone PSU FRU only — the switch chassis, fans, line cards and cables are sold separately.
NOT a DC PSU. AC input only (100–240 V). For DC-powered installations, use the matching MTEF-PSR-DC-x variant.
NOT the reverse-airflow variant. The -E suffix is P2C (port-side exhaust). For C2P (front-to-back, port-side intake) chassis, use the matching -F (or -P depending on series) airflow part — do NOT mix airflow directions within a single chassis.
NOT a fan module. Fan FRUs (MTEF-FAN-x) are sold separately.
NOT compatible with Quantum InfiniBand switches that use a different PSU FRU family (e.g., MQM8700 / MQM9700 use their own PSU SKUs).

Compatibility

Spectrum-1 Ethernet switches (P2C / -E airflow variants): SN2010, SN2100, SN2410, SN2700.
Spectrum-2 Ethernet switches (P2C / -E airflow variants): SN3420, SN3700, SN3700C.
Pairing rules: Both PSU slots in a single chassis must use the same airflow direction (-E with -E). Mixing -E and -F (or -P) PSUs in one chassis is not supported and will trigger an airflow-mismatch alarm.
Fan pairing: The chassis fan modules must also be the matching airflow variant (P2C fan FRU) for the cooling path to remain consistent end-to-end.
Always verify the exact NVIDIA part number printed on the existing PSU and the chassis airflow color code before swap-in. Consult the platform datasheet or NVIDIA support matrix for your specific switch revision.

Frequently Asked Questions (FAQ)
Q. What does the -E suffix mean on the MTEF-PSR-AC-E?
The -E suffix denotes airflow direction. On NVIDIA Mellanox Spectrum switch FRUs, -E is power-side intake / port-side exhaust (P2C). The PSU and fan FRUs in a chassis must share the same airflow direction; do not mix -E with -F or -P parts in one switch.
Q. Which switches use the MTEF-PSR-AC-E?
The Spectrum-1 family (SN2010, SN2100, SN2410, SN2700) and Spectrum-2 family (SN3420, SN3700, SN3700C) when ordered in the P2C airflow configuration. Always confirm the part number printed on the unit being replaced.
Q. Is the MTEF-PSR-AC-E hot-swappable?
Yes. In an N+N redundant configuration with two PSUs installed, the MTEF-PSR-AC-E can be replaced under load without interrupting data-plane traffic. Always remove the AC cord before extracting the module.
Q. Can I use this on a Quantum InfiniBand switch (MQM8700 / MQM9700)?
No. Quantum HDR / NDR switches use a different PSU FRU family with different power ratings and connector keying. Use the PSU specified in that platform's bill of materials.
Q. What is the condition of this unit?
Refurbished Grade A. Each unit is bench-tested by T.E.S IT-SOLUTIONS — input voltage range verification, 12V rail check under load, fan-spin and EEPROM/vendor-data validation — plus full cosmetic inspection. Ships in professional anti-static packaging from EU stock.
Why 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. Every PSU FRU is identified by MPN and airflow code before it ships, and every customer gets free pre-sale compatibility advice on PSU-to-chassis pairing, airflow direction, and fan-module matching. Multi-currency B2B invoicing, EU stock with worldwide express shipping, and direct technical contact with our engineering team — not a call-center.