bimetallic strip used in thermostat

　　Four elements for avoiding the use of self recovering fuses (PPTC)

　　The first element is overcurrent protection. PPTC is a very effective circuit overcurrent protection component. Under normal circumstances, PPTC exhibits a low resistance state, which can ensure the normal operation of the circuit. However, when the current exceeds the safety limit, PPTC will rapidly heat up, the material will undergo a phase transition, and the resistance will rapidly increase, thereby cutting off the circuit. This can effectively prevent damage to circuits and equipment caused by excessive current, and protect the safe operation of the entire system.

　　The second element is self-healing property. A significant feature is the self recovery property of PPTC. Once the current exceeds the safety limit, PPTC will automatically cut off the circuit and return to a low resistance state after the overcurrent disappears. This means that when the circuit load returns to normal, PPTC can automatically restore power supply without manual intervention. This automatic recovery feature can effectively shorten the recovery time of faults and improve the reliability of the system.

　　The third element is reliability. PPTC has high reliability through special materials and structural design. Firstly, PPTC has stable triggering current and breaking current, which can be customized according to requirements. Secondly, PPTC has a low failure rate and long lifespan. Due to the fact that PPTC material does not burn out under overcurrent conditions, its service life can generally reach tens of thousands of times or even higher. Finally, PPTC has low resistance drift and a small rated current temperature coefficient, which can maintain the stability of its specified electrical characteristics over a wide range of operating temperatures.

　　The fourth element is applicability. PPTC has a wide range of applicability and can be applied in various electronic devices and circuits. Whether in the fields of power protection, motor control, communication equipment, or consumer electronics, PPTC can provide reliable overcurrent protection for circuits. In addition, the size and electrical characteristics of PPTC can be customized according to the needs of different applications.

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