PFRA.030

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PTC Resettable Fuses are designed to protect circuits from overloads and to provide self-resetting thermal protection from electrical fire hazards. The PTC Resettable Fuse, or PolyFuse, offers the advantages of solid state thermal resistance elements and at the same time provides a low thermal resistance for effective current limiting. The PFRA.030 is an example of a particular type of PTC resettable fuse.

PFRA.030 products feature a fast response time and are available in a variety of current ratings from 30 mA to 1A. The fuse is characterized by a low trip temperature of 70°C, which enables this PTC resettable fuse to respond fast to any short-term overcurrents and protect the device from risk of thermal runaway. Likewise, the fuse has a low differential trip temperature of 10°C which allows it to be used for applications that require extremely precise temperature control.

In terms of its application field, the PFRA.030 fuse can be used in a variety of applications where fast response time and precision temperature control is required. For example, this type of resettable fuse is commonly used in automotive and medical applications, and its low power consumption allows it to be also used in consumer electronics. Additionally, the PTC resettable fuses feature a long-term reliability of 50,000 operations and a high temperature resistance up to 130°C to allow for safe and reliable operation in high temperature environments.

The PTC Resettable Fuse features a simple but effective working principle. When the current running through the fuse rises above the designed current rating, the fuse warms up due to the Joule effect. As the temperature rises, the fuse’s resistance increases until it reaches the protection temperature of 70°C, which results in a protection tripping of the circuit and subsequent overcurrent protection. After the overcurrent has been removed, the PFRA.030 automatically resets itself to its original state.

While the PTC Resettable Fuse offers a convenient and reliable protection solution for electrical circuits, its use should always be in combination with other safety measures. Additionally, it should always be well insulated to ensure that the fuse comes into contact only with the components it is designed to protect.

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