PFRA.185.2

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PTC Resettable Fuses, also known as polyfuses, are passive electrical components that are used to limit and protect electronic circuits from current overloads. They are the most cost-effective means of providing circuit protection in many applications. The PFRA.185.2 is a type of PTC Resettable Fuses, suitable for automotive and industrial applications.

This type of PTC fuse contains a resistive element within the body which transitions to increased resistance during an overload event. This in turn causes a thermal surge within the body of the fuse, increasing the resistance even more and eventually cutting off the flow of current. Once the fault is removed, the fuse resets itself to an operational state, allowing power to flow through the circuit again.

The PFRA.185.2 is designed for use in automotive, lighting and industrial applications. It is a robust fuse offering enhanced performance and reliability. The fuse’s maximum operating temperature range is –40°C to 125°C, and its operating current range is 0.6A to 7.5A. Like all PTC fuses, it offers a superior protection capability compared to standard fuse designs.

This type of fuse is ideal for protecting sensitive components from current overloads and short-circuit conditions. It also offers superior surge protection capabilities, and is capable of handling large inrush currents and voltage transients. The fuse is also designed to be immune to resonant and capacitive load effects, offering superior levels of performance in applications where these issues are a concern.

The PFRA.185.2 typically has two different test voltage ratings, rated at either 215VAC or 150VDC. This range of ratings makes the device suitable for use in a variety of applications, from consumer electronics to industrial machinery. The device can be used as both a permanent and a temporary fuse, depending on the application.

The working principle of the PFRA.185.2 is relatively simple. It relies on a thermally activated resistive element to detect an overcurrent condition. This element begins to heat up due to the high current, and eventually the resistance of the element rises to such a point that itcuts off the electrical circuit. After an overcurrent event, the device cools down and the resistance returns to its normal operating state.

In conclusion, the PFRA.185.2 is a PTC Resettable Fuse designed for use in automotive, lighting and industrial applications. This robust, reliable and cost-effective fuse provides superior levels of protection against overcurrent, short-circuit and surge conditions, and is suitable for use with both alternating and direct current circuits. Its thermally activated resistive element allows the device to detect and protect against dangerous overcurrents, before resetting itself and allowing the circuit to operate again.

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