1. Overcurrent and Short Circuit Protection:

• Self-Resetting Fuse: The primary advantage is its ability to act as a self-resetting fuse. When an overcurrent occurs, the chip heats up, causing a sharp increase in resistance that limits the current and protects the circuit. Once the fault is removed and the chip cools down, its resistance returns to a low state, and the circuit can resume normal operation without needing replacement, unlike traditional fuses.
   

   
• Prevents Damage: By limiting the current during fault conditions, the PTC thermistor chip protects sensitive electronic components from damage.

2. Overtemperature Protection:

• Temperature Sensing and Limiting: PTC thermistor chips can be used to sense and limit temperature. Above a certain temperature (the Curie temperature), their resistance increases significantly, which can be used to trigger a protective action or simply limit further current flow and thus heat generation.
   

3. Inrush Current Limiting:

• Suppresses Startup Surges: At startup, many devices experience a high inrush current. A PTC thermistor chip can have a relatively low initial resistance, allowing normal current flow, but if an excessive surge occurs, it will heat up and limit the current, protecting components.
   

4. Space-Saving and Miniaturization:

• Compact Size: The chip form factor allows for integration into densely populated circuit boards where space is at a premium. This is crucial in modern miniaturized electronic devices.
• Surface Mount Technology (SMT) Compatibility: Chip PTC thermistors are designed for surface mount assembly, which is a standard and efficient method for mass production of electronic devices.