Circuit protection, preventing overcurrent and overload, ensures safe and stable operation of equipment

PTC is used in the circuit to prevent overcurrent, the current increases, the temperature rises, and the temperature rises resistance value, so it is a positive temperature coefficient. This is mainly used in the power port to suppress the switch pulse.

Polymer PTC has better performance than ceramic PTC, so survival of the fittest, now, we basically see PPTC; the resistance is very small in normal operation, some can achieve milliohm, so the power is negligible in normal circuits; the size is small, the resistance changes very quickly after response, and the recovery after protection is fast, and it is resistant to impact.