Switching power supply suitable for use in any environment

Speaking of switching power supply(SMPS), a household name, everyone know how to use, but what environment it is suitable for use in, and where environment it is in will not shorten the life of the original, presumably all these issues in the muddle. Let us take a look below:
  Working environment temperature shall not exceed the following limits: a maximum ambient air temperature is not higher than 40 ℃, the lowest ambient air temperature is not lower than -15 ℃, water supply is less than 1 ℃, to ensure that water does not freeze.
  Relative humidity: average monthly maximum relative humidity is 90%, the lowest 15%.

  The working site should have no things which seriously affect the use of the product such as gas, steam, chemical deposition, dust and mold
Bacteria and other flammable, explosive, corrosive media, and should have  no violent shocks or jolts.
   Unless with protective measures, or products may not be used outdoors.
   no more than 1000 meters above sea level.

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