Thermal fuse, also known as thermal fuse, is a new type of electrical overheating protection element. This kind of component is usually installed in electrical appliances that are prone to heat. Once the electrical appliance fails and generates heat, when the temperature exceeds the abnormal temperature, the thermal fuse will automatically fuse, cut off the power supply, and prevent the electrical appliance from causing a fire. In recent years, most of the household electrical appliances with heating as the main function in our country, such as electric rice cookers, electricity bills, electric stoves, etc., are mostly equipped with thermal fuses, which can cut off the power in time when the internal parts of the machine fail to prevent further electrical appliances. Damage, but also put an end to the resulting fire. Only when the appliance fails and produces abnormal temperatures, it will fuse and cut off the power circuit.
This is different from fuse fuses, which are blown by the heat generated when the rated current is exceeded in the circuit.
Thermal fuses have the characteristics of accurate fusing temperature, high withstand voltage, small size and low cost. The rated temperature value and rated current value are marked on the shell of the thermal fuse, which is easy to identify and very convenient to use. It can be widely used in electrical equipment, electric heating equipment and practical electrical appliances for overheat protection.
The thermal fuse mainly has the following parameters:
①Rated temperature: sometimes called operating temperature or fusing temperature, it refers to the temperature at which the temperature rises at a rate of 1°C per minute to fusing temperature under no load.
②Fusing accuracy: refers to the difference between the actual fusing temperature and the rated temperature of the thermal fuse.
③ Rated current and rated voltage: The nominal current and voltage of the general thermal fuse have a certain margin, usually 5A and 250V.
