JCK-12R

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Fuses: JCK-12R Application Field and Working Principle

Fuses are a critical safety component used in electrical products, and fuse selection is an important factor in ensuring the safety of electrical products. The JCK-12R is a time-delay fuse that is suitable for protecting against inrush current without limiting the power supply capability of the circuit. In this article, the application field and working principle of the JCK-12R fuse will be discussed.

Application Field

The JCK-12R time-delay fuse is suitable for applications where an independent power supply protected from overloading and short-circuiting is needed. Typical applications include AC compressors, motors, and other electrical components with long start-up time. It is commonly used in applications where the current levels start very high, and then decrease quickly.

Working Principle

The JCK-12R time-delay fuse is a thermal-magnetic fuse, which means that it combines the features of both a thermal and magnetic fuse. The thermal component is used to protect the circuit from overheating and the magnetic component is used to protect the circuit from short-circuits.When the current flows through the fuse, the heat generated by the current\'s magnetic field is transferred to the bi-metallic strip. The bi-metallic strip then heats up and slowly bends. This bending releases pressure on the internal spring of the thermal component, allowing the current flow to be interrupted. At the same time, the magnetic field of the current creates a force that pushes the ferromagnetic plunger of the magnetic component together. This second reaction happens much faster than the thermal component\'s reaction, and interrupts the current flow quicker.Once the current is interrupted, the bi-metallic strip cools and the plunger opens, allowing the fuse to reset. This process occurs during normal operation, protecting the circuit from overloads and short-circuits.

Conclusion

The JCK-12R time-delay fuse is a versatile fuse that is suitable for high current applications, such as AC compressors, motors, and other long start-up time electrical components. Its thermal-magnetic design allows it to provide overcurrent and short-circuit protection while allowing the circuit to have sufficient power supply capabilities. By understanding its application field and working principle, electricians and users can make the most of JCK-12R fuse\'s features while protecting their circuits from electrical hazards.

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