020902.5MXP

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Fuses are a type of protective device used in electrical circuits for safety purposes, and 020902.5MXP is no exception. In this article, the application field and working principle of 020902.5MXP fuses will be discussed.

The application field of 020902.5MXP fuses mainly involves device protection and over current protection. It is suitable for protection of household appliances, instruments and various small power equipment, and can be used in the circuit of AC 50/60Hz with rated voltage up to 250V, rated current up to 8A. It is also used for over current protection of various electronic equipment and power equipment.

The working principle of 020902.5MXP fuses is based on two principles: the “self-heating effect” and the “melting principle”. When the current flows through the fuse wire, a resulting self-heating effect causes the wire temperature to rise, and the temperature of the wire gradually increases with the increase of the current. When the current increases to a certain level, the fuse wire reaches the melting point of the metallic conductor, and the metallic conductor breaks, thus cutting off the circuit.

When the circuit current is greater than the rated current of the fuse, the self-heating effect of the fuse wire is greater than the external cooling effect, and the temperature of the fuse wire rises rapidly. At this time, the resistance of the fuse wire also increases greatly, resulting in a large voltage drop on the wire and discharging large amounts of heat. The temperature of the fuse wire rises further until the melting point of the metallic conductor is reached, and the fuse wire breaks to protect the circuit.

In conclusion, 020902.5MXP fuses have a wide application field and their working principle is based on the self-heating effect and the melting principle. Fuses play an important role in device protection and over current protection, and should be used properly in order to ensure the safety of the devices.

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