PFRA.010.2

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PTC resettable fuses, also known as PolyFuse or PolySwitch, is a type of over-current protection device designed to be used in electronic circuits. It has a variety of application fields, as well as different advantages over other types of fuses. In this article, we’ll focus on the application field and working principle of PFRA.010.2 PTC resettable fuse.

A PFRA.010.2 PTC resettable fuse is most commonly used in consumer electronics such as mobile phones, digital cameras, and computers to prevent damage from short circuits and over-currents. This device is also used in industrial applications, such as automotive and locomotive, military, and aerospace applications. Due to their high reliability and repeatable performance, PTC resettable fuses are often used in products that require safety features.

The PFRA.010.2 PTC resettable fuse is a surface-mount device, and it features a small, square profile with four flexible leads. The leads are connected to a small ceramic surface-mount package, which contains a metal strip. The metal strip is connected to the positive power input of the device, allowing current to flow through it when power is applied. When a preset current level is exceeded, the metal strip melts due to the heat generated by the excess current, creating an open circuit and thereby stopping the current flow.

The PFRA.010.2 PTC resettable fuse is designed to reset itself after it is deactivated, allowing it to continue working even after it has been activated due to an over-current event. When the current level drops back below the preset level, the metal strip cools and re-establishes the connection, allowing current to flow through it again. This resetting feature helps to protect electronic devices from sustained over-currents and short circuits.

In summary, the PFRA.010.2 PTC resettable fuse is a versatile and reliable device that is widely used in consumer electronics and industrial applications in order to protect against over-currents and short circuits. Its resetting feature makes it an ideal choice for applications that require safety features. Although the resetting mechanism can lead to a temporary interruption in service, the cost savings and protection features provided by PTC fuses make them a wise investment.

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