The fuse should be selected very carefully. The right one can better ensure the circuit safety. If the wrong one is selected, the fuse will not be able to perform effective overload protection in the circuit, resulting in the occurrence of circuit failure disasters. Some friends are not very clear about the matters that need to be paid attention to when choosing a fuse, so the editor has summarized how to choose a suitable fuse for your reference and reading. How to choose a fuse? The following aspects can be considered:
1. What is the normal working current of the fuse, whether it can not be blown when the circuit is working normally, and can be blown in time when the circuit is overloaded.
2. Whether the working voltage of the circuit is suitable, the working voltage of the circuit must be less than the rated voltage of the fuse under standard circumstances.
3. When the circuit is overloaded, the circuit can be disconnected after the fuse is blown, so that the overload circuit is completely disconnected and cannot pass through other circuits, so as to effectively protect the circuit safety.
4. The minimum and maximum time allowed for abnormal current flow.
5. The ambient temperature of the fuse must not exceed the limit that the fuse can withstand. The temperature of some circuits is easy to rise when working, so it is necessary to select a suitable thermal fuse for protection.
6. The fuse must be able to withstand pulses, inrush currents, surge currents, starting currents and circuit transients. It must be ensured that it does not blow under normal operation of the circuit, and blows when the circuit is abnormal or overloaded.
7. Whether the size of the fuse in the circuit installation structure is appropriate, in some circuits with narrow spaces, some fuses do not have enough space for installation, and some miniature fuses are required to be installed in the narrow circuit.
8. Whether the fuse has a certificate issued by a certification body, the minimum requirement is to have a UL certificate or other certificates, so that the quality of the fuse can be guaranteed, otherwise it is prone to failure during use.
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