The PTC980, manufactured by EPCOS (TDK), is a positive temperature coefficient (PTC) thermistor. This component is designed primarily for overcurrent protection and self-regulating heating applications. It's a ceramic semiconductor resistor that exhibits a sharp increase in resistance when its temperature exceeds a certain threshold, providing a self-limiting effect that protects circuits and components.

Applications

• Overcurrent Protection: Used in power supplies to prevent damage from excessive current flow.
• Motor Starting Circuits: Provides a solid-state alternative to traditional starting capacitors for fractional horsepower motors.
• Self-Regulating Heaters: Used in applications requiring constant temperature, such as automotive cabin heaters and glue guns.
• Transformer Overload Protection: Protects transformers from overheating due to overload conditions.
• Telecommunications Equipment: Provides overcurrent protection in line cards and other telecom circuits.

Features

• Positive Temperature Coefficient (PTC): Resistance increases significantly with temperature, providing a self-limiting function.
• Self-Resetting: Automatically returns to its low-resistance state when the overcurrent or overtemperature condition is removed.
• Solid-State Construction: Offers high reliability and long lifespan compared to traditional fuses or thermostats.
• Compact Size: Allows for easy integration into small electronic circuits.
• High Inrush Current Withstand: Can handle high inrush currents during startup without tripping prematurely.

Benefits

• Effective Circuit Protection: Provides reliable overcurrent and overtemperature protection, safeguarding sensitive components.
• Reduced Downtime: The self-resetting feature eliminates the need for manual intervention or replacement after a fault, minimizing downtime.
• Enhanced Reliability: Solid-state construction ensures long-term reliability and consistent performance.
• Simplified Design: Easy to integrate into existing circuits thanks to its simple two-terminal configuration.
• Energy Efficient: In self-regulating heating applications, provides efficient temperature control.

The EPCOS (TDK) PTC980 is a robust and versatile component for overcurrent protection and self-regulating heating. Its self-resetting capability and solid-state design make it suitable for a wide range of applications. It is crucial to consult the official datasheet for specific electrical characteristics such as trip current, hold current, voltage rating, and resistance values before use in a specific application. Proper application and performance depend on understanding these detailed electrical parameters.