PPTC is a self-recoverable thermistor, which can be divided into ceramic PTC and polymer PTC. Its temperature resistance characteristics can be very well applied to the field of circuit overcurrent and overtemperature protection. When the normal working current passes through, PTC is in a low resistance state. When there is an abnormal overcurrent in the circuit, PTC is in a high resistance state. Only when the overcurrent in the circuit disappears, PTC returns to normal and is in a low resistance state again. At present, it has been widely used in the overcurrent and overtemperature protection of motors. However, when the motor has a fan for cooling, the protection effect cannot achieve the ideal effect. Since the difference between the normal working current of the circuit and the current when the motor is blocked is very small (less than 2 times the current), it is very difficult to select the PPTC resettable fuse, and the protection effect cannot be achieved.
You Might Like
Recommended ContentMore
Open source project More
Popular Components
Searched by Users
Just Take a LookMore
Trending Downloads
Trending ArticlesMore