Self-recovery fuse is a kind of over-current protection component. Self-recovery fuse is a kind of over-current electronic protection component. Processed by craftsmanship. Generally, conventional fuses need to be replaced after the overcurrent protection is blown once. This type of fuse is called a one-time fuse, while the self-recovery fuse will automatically recover after a while. So how to choose the resettable fuse type?

1. Determine what parameters are in the circuit

First determine the parameters such as a maximum ambient temperature for the normal operation of the protected circuit, b operating current in the circuit, c maximum operating voltage, and d maximum fault current;

2. Self-recovery fuse element that can adapt to the maximum ambient temperature and standard operating current of the circuit when selecting the model

According to the characteristics of the protected circuit or product, choose the self-recovery fuse, plug-in fuse, chip fuse, and disposable fuse suitable for your own product;

3. Compare the maximum electrical rating of the selected component with the maximum operating voltage and fault current of the circuit

According to the maximum working voltage, select the product series with the withstand voltage level greater than or equal to the maximum working voltage;

4. determine the action time

According to the maximum ambient temperature of the circuit and the operating current in the circuit, the product specification with suitable maintenance current is selected according to the temperature reduction rate of the self-recovery fuse;

5. verify the ambient working temperature

Determine the required action protection time that the selected product meets according to the action time curve of the self-recovery fuse of the selected model;

6. verify the overall dimensions of the resettable fuse element

According to the data provided in the specification, confirm that the size of the fuse of this specification meets the requirements and other relevant aspects;

The above content mainly introduces the six elements of resettable fuse selection. I believe that when buying a resettable fuse, you can refer to the above six resettable fuse selection elements.