RUEF250-1

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PTC Resettable Fuses

The RUEF250-1 is a type of Polymer Positive Temperature Coefficient (PPTC) resettable fuse intended specifically for use in applications with low voltages. When a fault or short circuit occurs, the PTC resettable fuse immediately senses the potentially damaging overload and absorbs all the energy, thus protecting most other electrical components in the circuit from experiencing an overcurrent condition. The resettable fuse is also operational in high temperature environments, allowing the system load to be safely and cost effectively protected.

The RUEF250-1 is a type of low-profile, thin-film PTC device that uses a special elastomer material to generate an electric current under specified conditions. This current is conducted through the components of the PTC resettable fuse, which are the elastomer, the terminal contacts, and the integrated thermistor. When a fault or overload condition occurs, the thermistor is energized and dissipates heat until the current flow is limited and the fuse is reset. The thermistor is designed for fast reset, protecting the circuit from high-energy or high-voltage faults.

In order to protect a circuit, the RUEF250-1 is connected between the source and the load, usually in series with the load. When a fault or overload condition occurs, the fuse opens the circuit and inhibits further current from flowing. The fuse is designed with a low internal resistance, allowing it to start conducting current as soon as the fault is removed. Once the fault is removed, the fuse returns to its initial state and the circuit re-energizes.

The RUEF250-1 offers a number of advantages compared to standard fuses. The component is smaller and provides more flexibility in designs as it can be soldered directly to a PCB with lead-free soldering methods. Furthermore, it offers resistance to higher temperatures and faster reset times for reducing system downtime. Finally, it offers improved system reliability due to high stability over a wide temperature range and resistance to mechanical shock and vibration.

The RUEF250-1 application field and working principle have been developed to provide an alternative solution for helping to protect circuits from overcurrents. This device may be used to replace standard fuses in a wide variety of applications with low voltages, particularly in high temperature environments where resettable fuses provide greater flexibility and cost-effectiveness. By implementing the RUEF250-1, circuit designers can easily achieve a reliable, cost-effective, and energy efficient way of protecting their circuits from high-energy or high-voltage faults.

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