OEM-style 172ย mm AC axial fan used in Liebertย NPOWER UPS systems to maintain designed airflow across power electronics and heat sinks. Direct-fit replacement matched to the original mounting pattern for quick service swaps.
Major-series construction with ball bearings for continuous duty at 50/60ย Hz. Typical performance for the 115ย VAC class includes high airflow and solid static pressure to preserve thermal margin in cabinet fan positions.
Each unit is Brand Newย before shipping for smooth operation and proper current draw. Supplied with lead wires; reuse your OEM harness/plug as applicable.
Product Options โ Tested vs. Brand New Power Modules
Option
Description
Warranty
Brand New
Brand-new genuine OEM cooling fan โ factory-sealed; covered by the full manufacturer warranty.
1โYear
Tested
Operationally verified fan removed from a functioning UPS; rotation confirmed, bearings evaluated for drag; cleaned and lightly lubricated.
90โDay
Specifications
Part #
Dimensions
Voltage
Frequency
Current / Power
Airflow (typ.)
Leads / Connector
MR2B6NNNX (Comairย Rotronย Major)
โ172ย รย 150ย รย 51ย mm
115ย VAC
50/60ย Hz
0.27/0.26ย A ย /ย 30โ31ย W
~235ย CFM
2-wire pigtail; reuse OEM harness/plug
Compatibility
Part #
Compatible Models
Notes
MR2B6NNNX
Liebertย NPOWERย UPS (cabinet fan locations)
Verified in vendor listings as NPOWER cabinet fan; confirm by P/N and mounting footprint.
Why buy from Gruber
Correct fitment help โ We match by Liebert P/N and cabinet build.
Tested before shipping โ We verify airflow, vibration, and amperage stability.
Fast turnaround โ Stocked for quick replacements to restore thermal margin.