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General information

Protection categories and protection classes


Protection categories
The protection category indicates suitability for different environmental conditions as well as the degree to which humans are protected against potential risks during use. According to DIN EN 60529 and DIN 40 050 the acronym IP stands for International Protection (or: International Safeguarding / International Protection Category).

Always including the letters IP, the protection category acronym is followed by two code numbers. If the two code numbers are not required or not supposed to be included, they are substituted by the letter X
1st code number: Protection against foreign objects and touch
2nd code number: Protection against water


Number 1

 Protection against foreign objectsProtection against touch
0no protectionno protection
1protected against solid foreign objects with a diameter of
50 mm or more
protected against access with the back of the hand
2protected against solid foreign objects with a diameter of
12.5 mm or more
protected against access with a finger
3protected against solid foreign objects with a diameter of 2.5 mm or moreprotected against access with a tool
4protected against solid foreign objects with a diameter of 1.0 mm or moreprotected against access with a wire
5protected against dust in harmful quantitiescomplete protection against touch
6dust-tightcomplete protection against touch

Number 2

 Protection against water
 
0no protection
1protection against dripping water
2protection against dripping water when the enclosure is tilted up to 15° from its normal position
3protection against spraying water falling at an angle of up to 60° from the vertical
4protection against splashing water from all directions
5protection against water jets (nozzle) from any angle
6protection against high-pressure water jets
7protection against temporary immersion
8protection against continuous immersion
9protection against water during high-pressure / steam cleaning operations especially in agriculture

When equipment is used in adverse conditions, additional factors – aside from protection class and protection category – need to be taken into account when selecting the equipment in order to guarantee trouble-free operation.

Protection class and protection category can be specified for electrical equipment.


Protection classes
The information on the protection class is used to identify the safety measures that are in place to prevent electric shock.

Protection classes only have an indirect impact in terms of environmental influences.

protection class I
products with protective earth wire


protection class II
products without protective earth wire


protection class III
products that can only be operated with protected extra-low voltage

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