IPX4 rating explained: splash-resistant, dust not rated
Resists splashing water from any direction; the X means dust was not tested.
Want the full system, or to decode any other code? See the IEC 60529 standard explained or the IP rating decoder.
What IPX4 protects against
Key facts
- Standard
- IEC 60529 (Ingress Protection code)
- Solids
- X = not declared (a placeholder, not zero)
- Water
- 4 = splashing from any direction
- Best for
- Earbuds, fitness wearables, portable speakers
- Does not cover
- Jets, immersion, a stated dust rating
What IPX4 protects against
The second digit, 4, means the device resists water splashing from any direction, tested with an oscillating spray. Think of it as raincoat-level protection: fine for sweat during a workout, rain and accidental splashes, but not for jets or submersion.
The X in the first position is a placeholder. It means the manufacturer did not test or declare a dust rating, not that the device has none. Many earbuds and wearables carry IPX4 because sweat and rain are the real concern, while a formal dust test was simply not run.
Why the X does not mean zero
A common misconception is that the X in IPX4 means no dust protection. It only means the dust test was not performed or reported. The device may still resist dust in practice; there is simply no certified figure for it.
If dust protection is important, look for a full rating with a number in the first position, such as IP54 or IP67. IPX4 tells you about splashing water only.
IPX4 at a glance
| Property | IPX4 |
|---|---|
| First digit (solids) | X - not declared |
| Second digit (water) | 4 - splashing |
| Jets | Not covered |
| Immersion | Not covered |
| Best for | Earbuds, wearables, sweat and rain |
IPX4 vs IPX7
Both leave dust undeclared (the X), so they differ only in water. IPX4 resists splashing from any direction; IPX7 resists temporary immersion to 1 metre for 30 minutes. IPX4 is raincoat-level protection for sweat and rain; IPX7 survives a dunk.
For earbuds worn during exercise, IPX4 is usually enough. For a device that might be submerged, look for IPX7 or a full IP67 rating.
Frequently asked questions
What does IPX4 mean?
Are IPX4 earbuds waterproof?
Does the X in IPX4 mean no dust protection?
Can I work out with IPX4 earbuds?
What is the difference between IPX4 and IPX7?
Related
Sources: IEC 60529 (IEC Webstore) · IEC: IP ratings. An overview for design reference - verify against the current edition before relying on it for compliance.