Features:
1. Temperature sensitivity (step characteristic)

    After exceeding the Curie temperature, the resistance increases sharply, equivalent to a thermal switch.

2. Auto Recovery

    After the temperature drops, the resistance automatically returns to a low value and can be reused (especially PPTC).

3. Overcurrent/Overheating Protection

    When the current is too high, the self heating temperature rises and the resistance increases sharply, limiting the current protection circuit; Cut off the circuit when the temperature is abnormal.

4. Contactless, long lifespan

    No mechanical action, no sparks, far exceeding the lifespan of traditional fuses.

5. Impact resistant and fast response

    Quick response to overload and short circuit, strong surge resistance.

Applications：
1. Overcurrent protection (self recovering fuse)

    Power supply USB、 Communication interface, battery pack short-circuit protection.

    Motor, transformer, coil stalling/overload protection.

2. Demagnetization (TV/monitor)

    At the moment of startup, there is a high current, followed by the PTC heating up and the current gradually decreasing, causing the coil to produce a decaying alternating magnetic field for demagnetization.

3. Household appliance overheating/dry burning protection

    Electric heaters, electric kettles, rice cookers, air conditioners: anti dry burning, over temperature protection.

4. Motor/compressor start

    Refrigerator and air conditioning compressor: low resistance conduction during startup, high resistance heating after startup, disconnect the startup winding.

5. Automotive Electronics

    Thermal management of power batteries, overcurrent protection for on-board charging, and motor control protection.

6. Constant temperature heating element