Explanation of the IP numbers

Explanation of the IP numbers for the degree of protection in accordance with DIN IEC 598/VDE 0711
Number
1st number

Brief description
Brief explanation of which foreign bodies must not be allowed to penetrate into the casing
2nd number

Brief description
Details on the protection to be provided by the casing
IP20
1st number
2
Protected from solid foreign bodies
Fingers and the like up to 80 mm long. Foreign bodies greater than 12 mm dia.
2nd number
0
Unprotected
No special protection.
IP...1
2nd number
1
Protected from water droplets
Water droplets (droplets falling vertically) do not cause any damage.
IP...3
2nd number
3
Protected from water splashes
Water spray from an angle of up to 60° from the vertical must not cause any damage.
IP...4
2nd number
4
Protected from water splashes
Water splashes from any direction must not cause any damage.
IP...5
2nd number
5
Protected from water jets
Water jets from any direction must not cause any damage.
IP...7
2nd number
7
Watertight (immersible)
No water in dangerous quantities may penetrate when immersed in water in the given conditions in terms of pressure and time.
IP...8
2nd number
8
Tight to pressurized water (under water)
The equipment is suitable for continuous operation under water in the conditions stated by the manufacturer.
IP4...
1st number
4
Protection from foreign bodies greater than 1 mm
Wires or strips thicker than 1 mm. Foreign bodies greater than 1 mm dia.
IP5...
1st number
5
Dust-protected
Dust penetration is not completely prevented but dust does not penetrate in quantities which inhibit proper operation.
IP6...
1st number
6
Dust-tight
No dust penetration.