With the increasing popularity of electronic equipment today, circuit protection is particularly important. Whether it is mobile phones, computers or household appliances, all kinds of components to ensure the safe and stable operation of the circuit. Its PTC thermistor, self-restoring fuse and fuse are three common circuit protection components, like the three musketeers of the guard circuit, each showing their powers to protect our electronic equipment from the threat of overcurrent.
We can see that. Let's meet
With the increasing popularity of electronic equipment today, circuit protection is particularly important. Whether it is mobile phones, computers or household appliances, all kinds of components to ensure the safe and stable operation of the circuit. PTC thermistors, self-restoring fuses and fuses are three common circuit protection components, like the three musketeers of the guard circuit, each showing their powers to protect our electronic equipment from the threat of overcurrent.
We can see that, let's meet the PTC thermistor. PTC is the English abbreviation of "positive temperature coefficient", as the name suggests, the resistance value of PTC thermistor will increase with the increase of temperature. When the circuit is working normally, the resistance value of the PTC thermistor is very small, and will not affect the normal operation of the circuit. When there is an overcurrent phenomenon in the circuit, the PTC thermistor will rapidly heat up due to the heat generated by the current, and the resistance value will increase sharply, thus limiting the current through and protecting the circuit. Once the fault is rectified, the temperature of the PTC thermistor will drop, the resistance value will return to normal, and the circuit will resume normal operation.
Self-restoring fuses, also known as polymer positive temperature coefficient devices (PPTC), are similar to PTC thermistors in that they also use temperature changes to achieve circuit protection. When the circuit is working normally, the resistance value of the self-restoring fuse is very low, and the effect on the circuit is negligible. When there is overcurrent in the circuit, the conductive particles inside the self-restoring fuse will expand due to the increase in temperature, resulting in the interruption of the conductive path, thus limiting the current through and protecting the circuit. Unlike the previous fuse, the self-restoring fuse after the fault is removed, the temperature will drop, the conductive particles will return to their original state, and the circuit will automatically return to normal work without manual replacement.
The fuse is our most familiar circuit protection element. Made of wire or sheet metal with a low melting point and connected in a circuit. When there is an overcurrent phenomenon in the circuit, the fuse will be blown due to the heat generated by the current, thus cutting off the circuit and protecting the circuit. Unlike PTC thermistors and self-restoring fuses, fuses are disposable components that can be manually replaced after blowing to restore the normal operation of the circuit.
Then, what are the differences and connections between these three types of circuit protection elements? In general,
With the increasing popularity of electronic equipment today, circuit protection is particularly important. Whether it is mobile phones, computers or household appliances, all kinds of components to ensure the safe and stable operation of the circuit. The PTC thermistor, self-restoring fuse and fuse are three common circuit protection components, like the three musketeers of the guard circuit, each showing their powers to protect our electronic equipment from the threat of overcurrent.
We can see that, let's meet the PTC thermistor. PTC is the English abbreviation of "positive temperature coefficient", as the name suggests, the resistance value of PTC thermistor will increase with the increase of temperature. When the circuit is working normally, the resistance value of the PTC thermistor is very small, and will not affect the normal operation of the circuit. When there is an overcurrent phenomenon in the circuit, the PTC thermistor will rapidly heat up due to the heat generated by the current, and the resistance value will increase sharply, thus limiting the current through and protecting the circuit. Once the fault is rectified, the temperature of the PTC thermistor will drop, the resistance value will return to normal, and the circuit will resume normal operation.
Self-restoring fuses, also known as polymer positive temperature coefficient devices (PPTC), are similar to PTC thermistors in that they also use temperature changes to achieve circuit protection. When the circuit is working normally, the resistance value of the self-restoring fuse is very low, and the effect on the circuit is negligible. When there is overcurrent in the circuit, the conductive particles inside the self-restoring fuse will expand due to the increase in temperature, resulting in the interruption of the conductive path, thus limiting the current through and protecting the circuit. Unlike the previous fuse, the self-restoring fuse after the fault is removed, the temperature will drop, the conductive particles will return to their original state, and the circuit will automatically return to normal work without manual replacement.
The fuse is our most familiar circuit protection element. Made of wire or sheet metal with a low melting point and connected in a circuit. When there is an overcurrent phenomenon in the circuit, the fuse will be blown due to the heat generated by the current, thus cutting off the circuit and protecting the circuit. Unlike PTC thermistors and self-restoring fuses, fuses are disposable components that can be manually replaced after blowing to restore the normal operation of the circuit.
