R911263387 is part of the NFD Mains Filters Series by Indramat Drives.
Specs
Product Type: Mains Filter Power Source: AC 440 V Voltage Tolerance: -15% to +10% Current Requirement: 50 A Frequency Requirement: 50/60 Hz Operating Temperature: 0 to +40 degree Celsius Humidity Tolerance: up to 90% Installation Altitude: up to 1000 meters above sea level Cooling Method: Natural Convection