MF-R020-2-99

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PTC resettable fuses, also referred to as polymer-positive-temperature-coefficient (PPTC) devices, are fuses designed to protect circuits by limiting overcurrent. In contrast to a conventional fuse, the process of removing and replacing the fuse is not necessary after an overload occurs. PTC resettable fuses are dynamic components, meaning they are able to reset the circuit back to it’s normal operating parameters after it has cooled. MF-R020-2-99 is a very popular type of PTC resettable fuse.

The MF-R020-2-99 PTC Resettable Fuse is designed for use in a wide variety of current protection applications, including low voltage consumer electronics, communication equipment, and automotive electronics. It features a small form factor, superior performance, and high current handling capabilities. The fuse is available in a wide range of current ratings from 0.7A to 40A.

The working principle of the MF-R020-2-99 is fairly simple. It consists of two main components, a PTC element and a shunt, which are connected in parallel. The shunt is a piece of copper, approximately 2-3mm in diameter, which serves as a path for current to travel through. The PTC element consists of two plates of polyethylene which serve as a semiconductor. When the current reaches the fuse’s rated value, the PTC element will heat up and increase its resistance. This in turn limits the current flowing through the circuit, effectively protecting it from an overload.

When the fuse has cooled and the current has been reduced to a safe level, the PTC element will reset back to it’s original state and allow current to flow again. This makes the MF-R020-2-99 very efficient and cost effective, as it eliminates the need to constantly replace fuses in the event of an overload. It also reduces downtime and eliminates costly repairs.

The MF-R020-2-99 is designed to sense and react to overloads and short circuits, making it a great choice for current protection applications. Its small form factor and high current handling capabilities make it ideal for a variety of different applications, from low voltage consumer electronics to automotive electronics. It’s ability to reset after cooling also makes it a cost-effective solution, as it eliminates the need to constantly replace fuses. For these reasons, the MF-R020-2-99 PTC Resettable Fuse is a great choice for current protection.

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