PFSM.075.2 Circuit Protection

PTC Resettable Fuses (PTCR) are an important component in electronic systems, where a current that exceeds a certain limit must be safely and quickly limited. The PTCR-075.2 is one example, designed for power supplies and other applications. In this article, we will discuss the application field and working principle of the PTCR-075.2.

Application Field

The PTCR-075.2 is a polymeric-type resettable fuse designed for power supplies and other applications requiring a wide range of current ratings and over-current protection. It is specifically designed to prevent fire and electric shock due to overloads or short circuits. It is also suitable for high-frequency switching applications and features an integrated thermistor for temperature compensation, making it ideal for a wide range of applications.

Working Principle

The working principle of the PTCR-075.2 is based on its polymeric material, which is essentially a resistor. When the current flow increases beyond its rated value, the resistance of the polymeric material increases, limiting the current and protecting the system from a fire or electric shock. The PTCR-075.2 also integrates a thermistor for temperature compensation, which helps limit the amount of current that is allowed to flow based on the ambient temperature. In addition to over-current protection, the thermistor also helps prevent the PTCR-075.2 from being damaged by fluctuating temperatures.

Advantages

The main advantages of the PTCR-075.2 are its wide range of current ratings, over-current protection, temperature compensation, and its ability to reset itself when the current is corrected. It is also highly reliable and able to withstand high temperatures, meaning it will not be damaged by frequent or frequent fluctuations in temperature. This makes it ideal for applications that are subject to changes in temperature or require high reliability.

Conclusion

In conclusion, the PTCR-075.2 is a polymeric-type resettable fuse designed for power supplies and other applications requiring over-current protection and temperature compensation. It is highly reliable, can handle a wide range of current ratings, and is able to reset itself when the current is corrected.