TRF250-145T

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PTC Resettable Fuses is a new type of protection device, mainly applied to the circuit, in order to protect the circuit from overload and shortcircuit problems. TRF250-145T is an example of this type of protection device. This article will briefly discuss the application and working principle of this product.

The application of TRF250-145T is extensive. It is suitable for all field of space and various types of power system. For instance, it can be used in all kinds of industrial control devices (such as Automated Test Equipment, Programmable Logic Controllers, Intelligent Motor Control applications, etc.), solar photovoltaic industry, household appliances, power distribution and control systems, portable electronic products, and even medical apparatus and instruments.

The working principle of TRF250-145T is based on Polymer Positive Temperature Coefficient (PPTC) technology. This product has an integrated thermal element with a pre-defined resistance value. Under normal working conditions, the local temperature will remain relatively low and this element will remain at a low resistance state (LRS). When an excessive over-current or short circuit occurs in the circuit, the resistance value of this element will dramatically increase (HRS). This will allow the current to be cut off, thus protecting the circuit from further damage caused by the over-current or short circuit. This working principle allows TRF250-145T to recycle, allowing it to recover from the over-current or short circuit situation without needing to be replaced.

In addition to providing over-current and short circuit protection, TRF250-145T also has over-voltage protection functions. This allows it to protect the circuit from abnormal voltage and high temperature. Moreover, its low profile design makes it easy for installation in practically any space-limited environment.

All in all, TRF250-145T has many features that make it an ideal protection device for many circuit applications. Its excellent working principle and efficient design make it suitable for all kinds of power system and electrical equipment, providing reliable protection against over-current and over-voltage. Thanks to its recycling feature, it is cost-efficient and easy to maintain, further adding to its value as a protective device.

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