RXE050

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PTC (Positive Temperature Coefficient) Resettable Fuses are an advanced form of fuse technology that can be used to protect a vast array of electrical and electronic devices. The RXE050 application field and working principle is often overlooked, so it is important to understand the device’s features and operation. This article will provide a comprehensive overview of the RXE050 Resettable Fuse, its application fields, working principle and other considerations.

RXE050 Application Fields

The RXE050 Resettable Fuse is designed to provide reliable current interruption over a range of currents over 10 to 20A. The device is typically used in both automotive and industrial applications, primarily for over-current protection. Automotive applications include protecting power-controlled solenoids and motors, computer systems, battery packs, and power relays. Industrial applications may include environments with high levels of dirt, dust, and humidity, where intermittent faults can occur due to external factors such as machine vibration, temperature, voltage, etc.

Working Principle

The RXE050 Resettable Fuse is designed to contain a positive thermal coefficient material inside a cylindrical housing. As the current flowing through the fuse increases, the internal positive thermal coefficient material experiences a rapid increase in its resistivity. This increase in resistance causes a rapid rise in temperature resulting in an interruption of the current flow. When the fault is cleared, the fuse will cool and then switch back on.

The RXE050 Resettable Fuse also features a feature known as “prevention of over-current” which allows the device to remain in a “blown” state for up to one hour before automatically resetting itself. This feature prevents equipment from operating continuously, even after the fault condition has been cleared, and further ensures reliable safety. In addition, the RXE050 provides excellent protection against momentary over-currents, as the device will trip the circuit before the peak current is reached.

Other Considerations

When selecting the RXE050 Resettable Fuse, it is important to take into consideration the ambient temperature, the power dissipation, the location of the device, and the desired operating lifespan. The temperature and power dissipation should be kept within the operating limits specified by the manufacturer. Additionally, the fuse should be located in a cool and dry place, since exposure to moisture may cause the device to trip prematurely. Finally, the desired lifespan of the device should be taken into consideration, since some fuses are designed to last for several years and others only a few months.

In summary, the RXE050 Resettable Fuse is a highly reliable and versatile device, which is used in a variety of automotive and industrial applications. The fuse is designed to contain a positive thermal coefficient material that rapidly rises in resistance when the current exceeds the specified limits. The device is capable of tripping quickly when a fault occurs, thereby providing reliable safety. Additionally, the fuse can be used in environments with high levels of dirt and dust, and can provide excellent protection against momentary over-currents. Finally, when selecting the fuse, it is important to consider the temperature and power dissipation, the location of the device, and the desired operating lifespan.

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