RT18 Series Cylindrical Cap Fuse

1.1 Ambient temperature: Not exceed 40℃; the mean value measured within 24h does not exceed 35℃, and  within one year is below this temperature value. The lower limit of the ambient air temperature is -5℃. 

1.2 Altitude: Not exceed 2,000 meters. 

1.3 Atmospheric conditions: The air is clean, and its relative humidity does not exceed 50% at the maximum  temperature 40℃; a higher relative humidity is allowed at a low temperature. For example, the relative  humidity can be up to 90% at 20℃; the middle condensation may occur occasionally due to temperature  changes under those conditions.  

1.4 Pollution degree: 3.

1.5 Installation category: III.

1.6 Please contact the manufacturer when the working conditions are different from the above conditions.