Self-healing fuse selection

1, to determine the circuit's parameters:
a maximum working ambient temperature
b standard operating current
c Maximum operating voltage (Umax)
d Maximum fault current (Imax)
2, choose to adapt to the maximum ambient temperature and standard operating current self-recovery fuse components
Use the operating current (A)} table of temperature reduction {ambient temperature (° C)) and select the temperature that best matches the maximum ambient temperature of the circuit. Browse the column to check the standard operating current value equal to or greater than the circuit. In the case of
3. Compare the maximum electrical rating of the selected component with the maximum operating voltage and fault current of the circuit
Use the electrical characteristics table to verify that the components you select in step 2 will use the maximum operating voltage and fault current of the circuit. Check the maximum operating voltage and maximum fault current of the device. Make sure that Umax and Imax are greater than or equal to the maximum operating voltage and maximum fault current of the circuit. In the case of
4, to determine the action time
The operating time is the amount of time that the component will switch to the high resistance state when the fault current appears on the unit. In order to provide the desired protection function, it is important to clarify the working hours of the recovery fuse element. If the component you selected moves too fast, an abnormal action or harmful action will occur. If the component is too slow, the protected component may be damaged before the component is switched to a high resistance state. In the case of
The typical operating time curve of 25 ° C is used to determine whether the operating time of the self-healing fuse element is too fast or too slow for the circuit. If yes, return to step 2 to re-select the spare element. In the case of
5, verify the environmental operating temperature
Ensure that the minimum and maximum ambient temperatures of the application are within the operating temperature range of the self-healing fuse element. Most self-healing fuse components operate from -40 ° C to 85 ° C. In the case of
6. Verify the dimensions of the self-healing fuse element
Use the Dimension Table to compare the dimensions of the self-healing fuse of your choice with the space conditions for the application.