A temperature class

A temperature class is a designation that determines the maximum temperature at which an electrical device, appliance or component can be safely used without risk of damage or fire hazard. The temperature class is especially important for electrical devices that generate heat or are exposed to elevated temperatures.

Temperature classes are standardized in accordance with standards and directives in different countries and regions to ensure the safety and reliability of electrical equipment.

There are various temperature class designation systems, each using letters or numbers. For example, in the insulation class system for electric motors (indicated by the letters F, H, B, etc.), the classes are distinguished according to the maximum temperature at which the insulation can be used. Temperature classes may also be designated numerically (eg class 155, class 180, etc.) and are used for other electrical equipment and components.

Class A: maximum temperature 105 °C
Class E: maximum temperature 120 °C
Class B: maximum temperature 130 °C
Class F: maximum temperature 155 °C
Class H: maximum temperature 180 °C
There are other classes, such as Class C (maximum temperature 90°C) and Class D (maximum temperature 120°C), but these are used less often and the temperature for a given class may vary depending on the particular device.

The classes can be different in different standards and norms, so it is important to find out the specific temperature class that applies to the specific type of electrical equipment that is being used. The manufacturer of electrical equipment should provide information about the temperature class in the technical specifications of the product.