F0805B2R50FWTR

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Fuses are electrical components that protect electrical systems from potential damages due to overcurrent, overtemperature, overvoltage, and short circuits. The F0805B2R50FWTR is a type of polymeric positive temperature coefficient (PPTC) fuse developed by Littelfuse, a leader in the field of circuit protection. This fuse offers superior performance in terms of current handing capabilities, temperature stability and reliability.

Application Field

F0805B2R50FWTR is a low-resistance, fast-acting PPTC resettable fuse designed for overcurrent and overtemperature protection of low voltage electronics. This fuse is suitable for a wide range of applications, such as general industrial machinery, motors, lighting, consumer electronics, telecommunication, medical devices, etc.

Working Principle

The F0805B2R50FWTR resettable fuse operates through the process of thermal runaway. It is equipped with a Negative Temperature Coefficient (NTC) thermistor that begins to rapidly warm up when an overcurrent is detected. This heating process causes the fuse to go into its “trip” state, whereby the current is stopped. The thermistor then begins to cool down and the current state is reset to normal. Once reset, the fuse can be manually reactivated.

The fuse is also equipped with a special overvoltage protection feature that further increases its reliability and performance. When the fuse is in its “trip” state, its resistance increases significantly in order to reduce the risk of an electric arc that could occur due to overvoltage. This feature helps extend the life of the fuse and ensure its reliable operation.

In addition to overcurrent and overtemperature protection, the F0805B2R50FWTR also offers short circuit protection. This is accomplished through the use of a special conductive polymer material that is able to sense a short circuit and then immediately shut off the circuit. The short circuit protection ensures that the device and its components are not damaged when a short is detected.

Overall, the F0805B2R50FWTR resettable fuse provides superior protection to a wide range of applications. Its fast-acting design, overvoltage protection and short circuit protection all ensure that electrical systems are safe and reliable.

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