glow plug fuse price.Self recovery fuse selection

　　1. Determine the following parameters of the circuit:

　　A Large working environment temperature b Standard working current c Maximum working voltage (Umax) d Maximum fault current (Imax)

　　2. Select self restoring fuse components that can adapt to the ambient temperature and standard operating current of the circuit

　　Use a temperature reduction {ambient temperature (℃) working current (A)} table and select the temperature that best matches the ambient temperature of the circuit. Browse this column to view values that are equal to or greater than the standard operating current of the circuit.

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

　　Use the electrical characteristic table to verify whether the components you selected in step 2 will use the high operating voltage and fault current of the circuit. Check the high operating voltage and high fault current of the device. Ensure that Umax and Imax are greater than or equal to the maximum working voltage and maximum fault current of the circuit.

　　4. Determine action time

　　The action time is the amount of time it takes to switch this component to a high resistance state when the fault current appears on the entire device. In order to provide the expected protection function, it is important to clarify the working time of the self restoring fuse element.

　　If the component you choose acts too quickly, abnormal or harmful actions may occur. If the component moves too slowly, the protected component may be damaged before the component switches to a high resistance state.

　　Use a typical action time curve of 25 ℃ to determine whether the action time of the self recovery fuse element is too fast or too slow for the circuit. If so, return to step 2 to reselect the backup component.

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Don't confuse these two important concepts when choosing a fuse.automotive fuse box