Vent Plug
Stainless steel/Aluminium
DA 284S

  • High degree of protection 
  • Waterproof membrane
  • Corrosion resistant
  • Food safe

Pressure differentials in a hermetically sealed enclosure are a result of the heat generated by electrical and electronic components in the enclosure, as well as the fluctuation of the outside temperature. In the case of negative pressure or vacuum, for example, dust and humidity can enter the enclosure through the door seal.

The DA 284S Stainless Steel Vent Plug provides a protected enclosure environment for valuable and crucial components with an IP66  rated degree of protection. A waterproof membrane inside the device allows air and humidity to leave the enclosure while not allowing moisture and dust from the outside to enter.

Torque5 Nm
Depth in enclosureapprox. 9 mm
Sealingsealing gasket NBR
Filterwaterproof membrane
DimensionsM40: Ø 58 x 31mm, M12: Ø 17 x 21 mm
Fitting positionvariable
Operating / Storage temperature-35 to +80° C (-31 to +176° F)
NoteMaterial adheres to limit values in accordance with RoHS3

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Make cut-out in enclosure wall of diameter 1.58 inches (40-40.2 mm) for size M40 or 0.48" (12-12.2 mm) for size M12, and mount vent plug with nut. Make sure that the sealing gasket is placed on the outer side of the enclosure. For optimal pressure compensation, it is recommended to use two devices on opposite sides towards the top of the enclosure.

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Part No.Thread MaterialProtection typeAir permeability¹1 packing unitWeight (approx.)
28401.0-00M40 x 1.5V2A (DIN 1.4305 / AISI 303)1IP66 (EN 60529) / IPX9K (EN 40050-9)1.200 liters/hr1 piece5.6 oz. (160 g)
28401.0-02M40 x 1.5V4A (DIN 1.4404 / AISI 316L)IP66 (EN 60529) / IPX9K (EN 40050-9)1.200 liters/hr1 piece5.8 oz. (165 g)
28404.0-00M12 x 1.5Nickel-plated aluminium²IP67220 liters/hr1 piece0.3 oz. (9 g)

1 at a pressure difference of min. 70 mbar; ² V2A is not sea waterproof

Dimensioned Drawing

Stainless Steel Vent Plug DA 284S
Aluminium Vent Plug DA 284