TR250-120

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PTC Resettable Fuses are the essential components used widely in power loss protection and circuit fault protection. TR250-120 falls into this category and it is an important product to provide environmental protection in many applications. In this article, I will explain the application field and working principle of TR250-120 and how it works to maximize its utility for your product.

TR250-120 is a 120V resettable thermal fuse with rated current of 0.250 A. It helps to protect the product from electrical short circuit, overload, short circuit from external power supply side, and short circuit caused by external components. It is commonly used in a variety of home appliances, office machines, communications products, automotive electric and electronic equipment, computers, home entertainment products, and commercial lighting.

The working principle of TR250-120 is quite simple. It has a temperature sensing element in the form of a thermistor, which can sense temperature changes. If temperature rises above a certain threshold, the resistance of the thermistor gradually increases. This results in electric current flow becoming more restricted, thereby limiting the electrical power passing through the circuit. When the temperature returns to normal, the resistance of the thermistor decreases, dragging the current back to its original level.

In addition, TR250-120 has a self-resettable feature. When the temperature surpasses a certain threshold, it automatically turns off and after cooling, it can restart. The reset time is typically limited between 1-5 minutes. Along with its inbuilt self-resetting property, TR250-120 also has anti-surge capability. It can limit the incoming surge voltage, thus protecting the product from high spikes.

Overall, TR250-120 is an important product in providing safety and environmental protection in many application fields. It is a user friendly product with simple working principle and the ability to reset itself. It also provides anti-surge capacity, further preventing the products from any overload and short-circuit hazard. From a practical perspective, the advantages of TR250-120 go far beyond its basic operational goals. It is the go-to solution when the safety of the product needs to be considered.

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