PFRA.600 Circuit Protection

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PTC Resettable Fuses is a type of device designed to protect against excess current, voltage, and temperature. The first PTC Resettable Fuse was the PFRA.600, developed by Protection Technologies (formerly Poly Fuse Corporation) in 1999. The device works by having a temperature sensitive Thermistor section and a current sensitive Resistor section. When a voltage and current test condition is met, the Thermistor section opens up and the Resistor section remains closed. This brief interruption is enough to reduce the current within the circuit, protecting it from a damaging overload.

The PFRA.600 is designed for max of 600V and maximum of 16 Amps. It is made up of three parts: two electrical contacts and a PTC Thermistor resistor. The two contacts are used to pass the current and the PTC Thermistor resistor is used to sense and control the amount of current. When current is flowing through the device, the Thermistor resistor creates heat. When a certain level of heat is reached, it will open up and interrupt the flow of current in the device. The PFRA.600 is designed to reset on its own once the current and temperature no longer reach a critical level, allowing the device to go back into operation.

The device is most often used in circuit protection applications. It can be used to protect sensitive components from damage caused by over-currents or surges, as well as protect the circuit from over-voltage events. The PFRA.600 is also used in reverse battery protection, over-current protection, and as a reset switch in applications such as computers. Additionally, it can be used to protect high-value components in critical circuits from damage due to overload or excessive temperatures.

The PFRA.600 is a popular choice for circuit protection as it is cost effective, reliable, and simple to install. Its robust design and construction allow it to handle high temperatures and current surges with ease, ensuring the circuit is protected from any unexpected spikes or shorts. Additionally, its self-resetting nature means it is able to provide protection even when its power is turned on and off multiple times over its lifetime.

Overall, the PFRA.600 is a great choice for circuit protection as it is not only cost effective, but also extremely reliable and easy to install. Thanks to its robust design and ability to self-reset, it can provide consistent protection against unexpected current or temperature spikes, protecting sensitive components and circuits from serious damage.

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