Where is the application where a ventilation plug is needed, which has at the first glance contradictory features: high protection class and ventilation at the same time? Having a closer look to this situation we find a lot of applications where electronic devices and control units must be protected from environmental conditions and simultaneously must "breath" for the reason of continuous functionality. To name just a few examples we immediately come to lighting applications, industrial control systems, automotive devices and pump housings. In other words: the ventilation plugs are asked every time when electronic systems must work in housings with high protection class without malfunction.

How are these ventilation plugs working? A semi permeable membrane inside the plug -known to most of you from casual and sports clothing - is responsible for allowing to pass the moist air out of the housing letting only dry air back into the housing: the moisture is blocked by the membrane. By this fact a perfect condition for electronic systems inside the enclosure is created after a short time of operation: dry air and at the same time pressure and temperature equalization. Applying ventilation plugs is an alternative of hermetically sealing and potting. It additionally allows board level repairing and board swaps.

Ventilation plugs are available with M 12X1,5 threads and can be ordered in different colours. They allow a typical air flow of 120 ltr/h at AP of 70mbar. They achieve protection class IP 68 (0,1 bar) or IP 69K (high pressure spray) within a temperature range from -40°C up to + 105°C.