Which kind of high temperature resistant outdoor power supply is better

Why should a power supply have a wide operating temperature range?

Depending on the application, a power supply with a wide operating temperature range may provide better reliability and a longer operating lifetime, prevent the need for a cooling fan or other special design consideration for thermal management, and reduce the overall cost of your system.

What temperature should a commercial power supply be rated?

Typical commercial power supplies are specified to support their full rated load over an ambient temperature range from zero or minus 25 degrees Celsius to around 50 degrees Celsius, and they may derate to 50% load at 70 degrees Celsius.

How does temperature affect the reliability of a power supply?

Since your power supply has a specific efficiency, energy will inevitably be wasted as heat (in watts), which will lead to an increase of ambient temperature within a system. This will decrease the reliability of the supplies’ components. High temperature environments can also cause insulators to fail and mechanical connections to loosen.

Is high temperature bad for your power supply?

High temperature has several negative effects on the performance of your power supply. It is pretty clear that a high temperature environment can cause your supply to overheat.

What is a high-efficiency power supply?

This means that a power supply with a wide operating temperature range is likely to have a high-efficiency rating as well. Power supplied with lower efficiencies are more likely to require aggressive cooling methods to maintain their reliability at higher ambient operating temperatures.

What is a good ambient temperature for a power supply?

Some applications may require ambient operating temperatures as low as -40 degrees Celsius and as high as +85 degrees Celsius, or an even wider range. A number of factors can influence the ambient temperature that a power supply is subjected to in a given application, including the following: