The IK rating classifies the level of protection that electrical appliances provide against mechanical impacts from outside. It is defined by standard IEC 62262. The degree of mechanical protection is identified by a code that consists of the letters IK followed by two digits:
| Code | Impact Energy | Test |
| 00 | Non-protected | |
| 01 | 0.15 joules | Resistant against an impact from an object of 200 grams thrown from a distance of 7.5 cm |
| 02 | 0.20 joules | Resistant against an impact from an object of 200 grams thrown from a distance of 10 cm |
| 03 | 0.35 joules | Resistant against an impact from an object of 200 grams thrown from a distance of 17.5 cm |
| 04 | 0.50 joules | Resistant against an impact from an object of 200 grams thrown from a distance of 25 cm |
| 05 | 0.70 joules | Resistant against an impact from an object of 200 grams thrown from a distance of 35 cm |
| 06 | 1.00 joule | Resistant against an impact from an object of 500 grams thrown from a distance of 20 cm |
| 07 | 2.00 joules | Resistant against an impact from an object of 500 grams thrown from a distance of 40 cm |
| 08 | 5.00 joules | Resistant against an impact from an object of 1.7 kg thrown from a distance of 29.5 cm |
| 09 | 10.00 joules | Resistant against an impact from an object of 5 kg thrown from a distance of 20 cm |
| 10 | 20.00 joules | Resistant against an impact from an object of 5 kg thrown from a distance of 40 cm |