Vent Plug
DA 284

  • UL Type 1, 4, 4X & IP66 protection
  • Waterproof membrane
  • Easy to install
  • Two sizes - M40 & M12

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 trough the door seal. The DA 284 Vent Plug provides a protected enclosure environment for valuable and crucial components with a UL 4X 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.

Mountingthread with nut (see below)
Torque5 Nm
Materialplastic according to UL 94V-0, light grey,
weather and UV light resistant according to UL 746C (f1)
SealingNBR gasket
Filterwaterproof membrane
Operating / Storage temperature-31 to +158 °F (-35 to 70 °C)
Protection typesee below
Agency approvalsUL File No. E234324, EAC
Environmental ratingType 1, 4 and 4X

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Make cut-out in enclosure wall of diameter 1.58 inches (40,5+0,5 mm) ) for size M40 or 0.48 inches (12+0,2 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.

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Part No.ModelThread length (depth in enclosure)Protection typeAir permeability¹1 packing unitWeight (approx.)
28405.0-00M40 x 1.5approx. 16 mmIP66 (EN 60529) / IPX9K (EN 40050-9)1200 liters/hr2 pieces3.2 oz. (90 g) total
28406.0-00M12 x 1.5approx. 10 mmIP66 (EN 60529) / IPX9K (EN 40050-9)120 liters/hr2 pieces0.14 oz. (4 g) total

Dimensioned Drawing

DA 284 Vent Plug M40