White Paper: Manufacturing & Prototyping

The Perfect Climate Inside Your Enclosure


Electrical systems are becoming increasingly compact and the number of circuits per unit volume is growing, leading to higher heat generation per unit volume. The rule of thumb for semiconductors states that increasing the component temperature by 10 K in relation to the maximum permissible component temperature reduces the part’s service life by 50%. A constant temperature is therefore the best prerequisite for a long service life and high reliability of all the electronic components. Particularly in the case of a completely populated enclosure, it is important that enough cool air flows past the components. There are several ways of achieving this as efficiently and responsibly as possible, but the right choice depends on several factors. In this white paper, we explain the foundation of a perfect climate for the sensitive electronic devices in the enclosure.

Industrial Climate Control Considerations

When designing the enclosure, it is important to think carefully in advance about where it will stand. It seems logical to avoid places where it would get particularly hot, but that is not always possible in practice. You must also take into consideration any needs for future expansion where additional space would be required. Is there enough space to comfortably accommodate the additional control system? Nevertheless, the most important issue remains: Is the temperature level within the permissible operating range of the installed components or does the enclosure need climate control?

There are also standards that these systems must meet. One of the requirements relates to the detection of heat. The DIN EN IEC 61439 standard “Low-voltage switchgear and control gear assemblies” has been in effect since November 1, 2014. Depending on the strength of the current, proof by calculation or testing is required. If such proof has not been provided, liability and insurance problems may arise in extreme cases.

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