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facts&DATA

Definition of the IP degrees of protection

For applications in industrial environments, degrees of Practical notes:
protections and standards were defined that specify For “normal” industrial systems where multipole
the environmental impact regarding contact, protection connectors are used in closed factory halls, protec-
against foreign bodies and humidity to which a system tion according to IP54 is normally offered = protected
can be exposed without being damaged. The degrees of against dust + protected against splashing water. This
protection are defined in the IP standard of DIN EN 60 protection is normally completely sufficient. For systems
529: degrees of protection achieved through housings in outdoor applications (vehicles, snow guns, etc.) we
(IP code). recommend protection according to IP65 = dustproof +
The IP code consists of a two-digit number that indicates protected against jets of water. A protection according
the relevant protection degree. The first digit specifies to IP67 or IP68 is required for only a few outdoor applica-
the protection degree for the protection against contact tions unless a continuous immersion of the components
and foreign bodies while the second digit specifies the cannot be avoided.
protection against water and humidity. The following tables are to describe the protection
degrees in detail:

Table 1: Protection against contact and foreign bodies

1st Protection against accidental contact Protection against foreign bodies

0 No protection No protection

Protection against contact with large parts of Protection against foreign bodies
1
the body, for example the back of the hand with a diameter of 50 mm and larger.
Protection against contact with the finger Protection against foreign bodies
2
of 12.5 mm and larger. with a diameter of 12.5 mm and larger.
Protection against contact with tools and Protection against foreign bodies
3
wires larger than 2.5 mm with a diameter of 2.5 mm and larger.
Protection against contact with tools and Protection against foreign bodies
4
wires larger than 1 mm with a diameter of 1 mm and larger.
Protection against dust:
Penetration of dust is not fully prevented, but dust
Complete protection against
5 must not penetrate to such an extent that the
accidental contact
equipment’s functionality or safety is restricted in any
way
Dustproof:
Complete protection against
6 No penetration of dust possible with a negative
accidental contact
pressure of 20 mbar.

288 Subject to change without further notice