CPP Series

Product Introduction

       The PTC power thermistor is a circuit protection and control component with a positive temperature coefficient characteristic, functioning as a "self-recovering safety guard" for equipment. Its core is based on barium titanate ceramic or polymer materials, enabling precise protection and regulation through nonlinear resistance changes with temperature.

       Its operational mechanism is highly intelligent: at room temperature, it remains in a low-resistance state (several ohms to several thousand ohms) and has minimal impact on normal circuit operation when connected in series. When faults such as overcurrent or short circuits occur, heat generated by the excessive current rapidly raises its temperature to the critical Curie point (typically 60°C–125°C), causing resistance to instantaneously increase by 3–8 orders of magnitude. This shift from low to high resistance quickly limits the current to a safe range, effectively "disconnecting" hazardous currents. Once the fault is resolved and temperature decreases, it automatically returns to the low-resistance state without replacement, allowing reuse for over 100,000 cycles—a significant advantage over traditional one-time fuses.