Pressure Compensation Device Snap-in
DA 284 | IP66

  • High degree of protection
  • Waterproof membrane
  • Easy to install due to snap-in action

In enclosures and housings with a high protection class, differential pressure happens due to internal and external temperature changes. In the event of negative pressure, dust and humidity can be drawn into the enclosure through the seals on the doors. This can cause condensation when the air in the enclosure cools down. The easy-to-fit DA 284 pressure compensation device enables pressure compensation with protection class IP66. Additionally, the watertight membrane inside the pressure compensation device allows humidity to escape from the cabinet at overpressure, while preventing water, humidity or dirt intrusion at under pressure.


Snap-In, mounting from outer side

Wall thickness1 to 4 mm
Depth in enclosureapprox. 15 mm, according to wall thickness
Sealingsealing gasket EPDM
Filterwaterproof membrane
DimensionsØ 70 x 33,5 mm
Fitting positionvariable
AccessoriesDisassembly tool, Art. No. 283038
NoteMaterial adheres to limit values in accordance with RoHS3

Make cut-out Ø 40.0+0.5 mm in enclosure wall for size M40. Attach pressure compensation element from the outer side of the enclosure (housing). Make sure that the hole is round and free of burrs. The sealing ring must be mounted on the outer side of the housing wall. Apply sufficient pressure so the five snap-in hooks fully engage. Snap-in pressure is easily adaptable to wall thickness of the enclosure.

Art. No.MaterialProtection typeAir permeability1Operating/
Storage temperature
packing unitWeight (approx.)Approvals
28420.0-00plastic according to UL94 V-0, light grey; weather proof and UV light resistant according to UL746C (f1)IP66 (EN 60529) / IPX9K (EN 40050-9)2000 l/h-35 to +70 °C
(-31 to +158 °F)
1 piece

45 gUL E234324EAC

1 at a pressure difference of min. 70 mbar

Technical drawing