IP42 is an IEC 60529 ingress-protection rating that describes two distinct things. The first digit, 4, means the enclosure blocks solid foreign objects of 1.0 mm and larger, such as most wires, screws, and small tools, but it is not sealed against fine dust. The second digit, 2, means it resists vertically dripping water when the housing is tilted up to 15 degrees from its normal position.
In practice, IP42-rated LoRaWAN devices suit sheltered indoor and semi-protected settings, such as utility rooms, cabinets, ceilings, and covered outdoor mounts where only incidental drips are expected.
IP42 is not waterproof, dust-tight, or suitable for jets, washdown, or submersion. Reach for higher ratings when the deployment demands more.
- Heavy dust or particulates: look toward IP5X or IP6X enclosures.
- Rain, sprays, or jets: consider IP44, IP65, or higher.
- Temporary or continuous submersion: choose IP67 or IP68.
Matching the enclosure rating to the real environment protects electronics and prevents premature field failures.
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Frequently asked questions
Is IP42 waterproof?
No. The second digit, 2, only protects against vertically dripping water when the enclosure is tilted up to 15 degrees from vertical. IP42 does not withstand sprays, jets, washdown, or submersion.
What does each digit in IP42 mean?
The first digit, 4, means protection against solid objects 1.0 mm and larger, like wires and small tools. The second digit, 2, means protection against dripping water at up to a 15-degree tilt.
Is an IP42 device dust-tight?
No. A first digit of 4 keeps out objects 1.0 mm and larger but not fine dust. For dust protection you need a 5 (dust-protected) or 6 (dust-tight) rating, such as IP54 or IP65.