how does a resettable fuse work.Slow melting fuse_mini cooper fuse box factory

27 2024-09

　　Slow melting fuse

　　Slow melting fuses have unique advantages in specific circuit applications.

　　Unlike fast melting fuses, slow melting fuses have a relatively longer melting time. This characteristic enables it to provide better protection in certain specific circuit environments.

　　Slow melting fuses are usually suitable for devices with high starting currents, such as motors, transformers, etc. These devices generate a large surge current during startup, and if a fast melting fuse is used, it may accidentally melt due to the momentary high current. Slow melting fuses can withstand a certain amount of high current surge for a certain period of time, and after the equipment is started normally, they can protect against abnormal situations such as overload or short circuit in the circuit.

　　The working principle of slow melting fuses is achieved through their special melt structure and materials. Its melt is generally made of thicker metal wires or strips, which have higher heat capacity and lower electrical resistivity. In this way, when the current passes through, the temperature of the melt rises relatively slowly, and it takes a longer time to reach the melting temperature.

　　In practical applications, slow melting fuses also need to be selected reasonably according to the specific requirements of the equipment. For example, factors such as the rated current, starting current, and working environment temperature of the equipment need to be considered. At the same time, it is also necessary to pay attention to the installation method and position of the fuse to ensure that it can work properly and provide the best protection effect.

　　In short, slow melting fuses provide reliable protection for equipment in certain specific circuit applications due to their unique melting characteristics. It complements the fast melting fuse and jointly safeguards the safe operation of electronic circuits.