IP protection class

The protection class indicates the suitability of electrical equipment for different environmental conditions and the protection afforded to persons against potential hazards arising from the use of such equipment.

Code number Brief description Definition
0 Not protected -
l Protection against solid objects of 50 mm or greater in diameter The access probe, a sphere of 50 mm in diameter, shall not fully penetrate the enclosure.
2 Protection against solid objects of 12.5 mm or greater in diameter The access probe, a sphere of 12.5 mm in diameter, shall not fully penetrate the enclosure.
3 Protection against solid objects of 2.5 mm or greater in diameter The access probe, a sphere of 2.5 mm in diameter, shall not penetrate the enclosure at all.
4 Protection against solid objects of 1.0 mm or greater in diameter The access probe, a sphere of 1 mm in diameter, shall not penetrate the enclosure at all.
5 Protected against dust The ingress of dust is not completely prevented. The quantity of dust that enters must not impair the safety or satisfactory operation of the equipment.
6 Dustproof No ingress of dust