PFRA.400.2

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PTC Resettable Fuses

PTC (positive temperature coefficient) resettable fuses are a type of electrical protection device designed to shut off an electric system when current flow reaches an abnormal level. The primary purpose of the device is to prevent damage to the electrical circuits and equipment due to high current. The PFRA.400.2 is a type of PTC resettable fuse specifically designed for use in telecommunications and consumer electronics applications.

The PFRA.400.2 utilizes a special silicon wafer as its main component. The wafer contains large amounts of embedded carbon for heat generation. When the current flow reaches an abnormal level, the silicon wafer rapidly absorbs energy, generating enough heat to cause the fuse to open the circuit. This releases pressure, which decreases the current flow quickly and effectively, thus preventing further damage.

The PFRA.400.2 is designed to work in a variety of applications. It is most commonly used in high-end telecommunications, as well as consumer electronics, network infrastructure, medical equipment, and power tools. In these applications, it provides reliable overcurrent protection up to 400 volts AC and 96 amps. The device also offers excellent surge capability for line transients, and has a limited capacitive load for high-frequency operation.

The working principle behind the PFRA.400.2 is simple yet effective. When current flow increases beyond the accepted level, a thermal bimetal switch is activated, which causes the fuse to open even without any power applied. The pressure that activates the switch is released, and the current flow is rapidly reduced, thereby protecting the circuit from further damage.

In addition to providing reliable overcurrent protection, the PFRA.400.2 has a few other advantages. It does not require any maintenance or inspections and is resistant to environment conditions. Its design also makes for easy installation and replacement, making it a great choice for a variety of applications. Finally, its cost-effectiveness makes it a great value for those working to keep their facility safe and compliant with any applicable safety regulations.

The PFRA.400.2 is a great example of how important protective devices can be when it comes to ensuring the safety and operation of electrical systems. Its efficient working principle makes it a reliable choice for protecting devices and systems in telecommunications, consumer electronics, network infrastructure, and other applications.

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