The B57211P509M302 is a Positive Temperature Coefficient (PTC) thermistor from EPCOS (TDK). PTC thermistors are thermally sensitive resistors that exhibit a large positive change in resistance with increasing temperature. This characteristic makes them ideal for overcurrent protection, self-regulating heating, and temperature sensing applications.

Applications

• Overcurrent Protection: Protecting circuits from excessive current by increasing resistance when current exceeds a certain threshold.
• Self-Regulating Heaters: Providing constant temperature heating by limiting current as temperature rises.
• Temperature Sensing: Monitoring temperature in various electronic devices and systems.
• Motor Starting: Assisting in motor starting by providing a temporary current boost.
• Demagnetization Circuits: Used in CRT monitors and televisions for demagnetizing the screen.

Features

• Positive Temperature Coefficient: Exhibits a large positive change in resistance with increasing temperature.
• Self-Resetting: Automatically resets after the overcurrent condition is removed and the device cools down.
• Compact Size: Allows for easy integration into existing circuit designs.
• Wide Operating Temperature Range: Suitable for use in various environmental conditions.
• RoHS Compliant: Environmentally friendly, meeting RoHS standards.

Benefits

• Improved Circuit Protection: Protects sensitive electronic components from damage due to overcurrent conditions.
• Reduced Downtime: Minimizes equipment failures caused by overcurrent events, reducing downtime and maintenance costs.
• Enhanced Safety: Provides a reliable means of protection against electrical hazards.
• Cost-Effective Protection: Offers a cost-efficient solution for protecting electronic equipment from overcurrent damage.
• Self-Regulating Heating: Provides constant temperature heating without the need for external control circuits.

This PTC thermistor provides a robust and reliable solution for overcurrent protection and temperature sensing applications. Its positive temperature coefficient, self-resetting capability, and compact size make it suitable for a wide range of applications. It is designed to meet the stringent requirements of modern electronic systems, ensuring reliable operation and enhanced protection against overcurrent events.