PRG21BC3R3MM1RA

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PTC Resettable Fuses are devices that protect electric circuits against overcurrents or short circuits. When excessive current passes through the fuse, it will trip, allowing the current to cease and offering a reset option after current has been reduced.

The PRG21BC3R3MM1RA is one such PTC Resettable Fuse, which can offer robust protection in a wide range of applications. This fast-acting fuse is designed for overcurrent and short-circuit protection for low voltage, automotive battery-supplied circuits. Furthermore, the longevity of the part is enhanced by the use of an innovative monolithic ceramic body, which ensures a reliable, efficient operation.

The PRG21BC3R3MM1RA utilises Positive Temperature Coefficient (PTC) technology, where the resistance increases as temperature rises. In contrast, ordinary fuses blow the fuse element in case of overcurrents or short circuits, whereas the PRG21BC3R3MM1RA features a bi-metallic element that trips and cuts off the current, providing temporary protection while simultaneously resetting. This fuse has a fuse response time of 200mA in 0.12s to 0.35A in 0.20s.

Continuity is restored when the operating temperature is reduced below the reset temperature. When the load is removed, the temperature is reduced to a critical level, causing the continuity between the fuse ends to be re-established. This cycle will repeat if the fuse experiences an overload or short circuit.

This resettable fuse comes with a storage temperature of -55°C - 150°C and a 5 ampere rated current and maximum power dissipation of 300mW. The voltage withstand capability is between 16V to 28V and the nominal rated voltage is 3V. The PRG21BC3R3MM1RA is a cylindrical type clamp type of fuse that provides a reliable over-current and short-circuit protection in a wide variety of applications, from small automotive applications to large, high-power industrial electronic assemblies.

In summary, the PRG21BC3R3MM1RA is a PTC Resettable Fuse that provides robust protection in a variety of different applications, from automotive to industrial assemblies. Its resetting feature makes it an attractive option for those looking to protect their circuits from overcurrents, short circuits, and thermal overloads.

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