PFRA.160.2

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PTC (Positive Temperature Coefficient) Resettable Fuses, also known as PolyFuses, are an innovative type of fuses that offer many advantages over standard Fuses. The PFRA.160.2 makes up one of the most popular models of PTC Resettable Fuses, which can provide a reliable solution for a range of applications and requirements.

The PFRA.160.2 consists of a metal oxide, which is a heat-sensitive substance that is encapsulated within a cylindrical piece of plastic-like material. When it is exposed to heat the metal oxide begins to expand, causing an increase in resistance and eventually halts the flow of electricity. This is what provides the protection to the circuit.

Because the PFRA.160.2 is a resettable fuse, it can be reset by simply cooling the fuse down to below the trip temperature. The trip temperature, which is typically around 135°C, is the temperature at which the fuse trips and shuts off the current flow. This makes the PFRA.160.2 extremely handy in the case of circuit overheating, as it can be immediately reset and the circuit can continue to operate without having to replace the fuse constantly.

The PFRA.160.2 is mainly used in automotive applications as it provides a great alternative to the traditional fuse and offers improved protection against both surges and overloads. It is also commonly used in applications where the current flow must be temporarily stopped for a specific period of time, such as with alarm systems or security guards. The small size of the fuse also makes it an appealing option for portable electronic devices.

In terms of working principle, the PFRA.160.2 will be triggered when the current passing through it exceeds the preset rating. When this happens, the fuse will heat up and eventually reach the predetermined trip temperature. At this point, the metal oxide will expand, increase the resistance, and cut off the electrical current. Once the temperature drops below the trip temperature, the fuse can be reset and the circuit will be able to resume operation.

PTC Resettable Fuses have many advantages over traditional fuses. They are smaller, more reliable, and can be reset without having to replace the fuse every time. They also provide improved protection against both surges and overloads. All of these reasons make the PFRA.160.2 an ideal choice for a range of automotive, security, and portable electronics applications.

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