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3404.2418.22 Fuses

Fuses are electrical safety devices wired into electrical circuits to prevent the flow of electric current above safe levels. Unlike circuit breakers or other types of over-current protection devices, fuses are designed to operate only once. To continue their operation after a surge or over-current situation, they must be replaced. Thus, it is important to select the appropriate type and size of fuse for any given application, so that it functions as intended and safely.

Application Field

3404.2418.22 Fuses are designed for use in industrial equipment, mainly tools, instruments and machinery. These fuses are typically used in the protection circuits of electrical apparatus, such as electronic overloads or relays. They are also used in the consumer electronics field, such as: joining together with the operational power circuitry of televisions, DVD players, and other electronic consumer goods.

Working Principle

To initiate the working principal of a 3404.2418.22 fuse, the current must pass through the metal strip that is connected to the terminals of the fuse. During a surge, the metal strip starts to heat up and when the current increases to a specified level, the metal strip melts and breaks the circuit. In some cases, this causes the two live components to connect, triggering an alarm or cutting off the power supply to the circuit.

Another way to understand the operation of a 3404.2418.22 fuse is by looking at its construction. Typically, it has two terminals; on one terminal is a metal strip of fusible alloy (with silver and lead content), while the other terminal has a ceramic body. The fusible alloy bridged between the two terminals carries current, but when the current exceeds the fuse\'s rated current, the strip melts eventually breaking the contact between the two terminals. This is how the fuse is designed to protect the electrical circuit.

Once the fuse activates, the metal strip oxidizes which increases its resistance creating a high temperature. This excessive temperature results in the melting of the metal strip that bridges the two terminals and causes the circuit to break or short circuit. The heat dissipated by the metal strip is cooled by the ceramic body to maintain the original temperature. This design allows the fuse to protect the circuit in the event of a short-circuit or overload.

Conclusion

The 3404.2418.22 fuse is a specialized fuse type designed to provide reliable protection to a variety of electrical equipment. Their working principle relies on the connection between two metal strip terminals; if the current flow exceeds the rated value, the metal strip heats up, eventually melting and breaking the connection. It also has a ceramic body which absorbs heat from the metal strip during its operation. Thus, the 3404.2418.22 fuse is a very effective and reliable overcurrent protection device for a wide range of circuit applications.

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