SMD1812P014TSA

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PTC Resettable Fuses are among the most powerful protective devices for overcurrent situations. The SMD1812P014TSA is among the best-of-class resettable fuse. It has minor current leakage and excellent cycling characteristics.

The application field of the SMD1812P014TSA is mainly in portable computers, mobile phones, digital cameras and other electronic products, which need external power components. This allows the device to protect its products from voltage fluctuation and from over current or short circuiting.

The working principle of the SMD1812P014TSA is based on its two components : a negative temperature coefficient resistor (NTCR) and a metal oxide varistor (MOV). When subjected to electricity, the NTCR acts as the conductor for the current, while the MOV acts as the regulator which limits the amount of current flowing through the device.

In normal operation, the MOV will remain in the "open" state, meaning it allows higher voltages, but will regulate the current. When an overcurrent or short circuit occurs, the MOV will change its state to the "closed" state, meaning it will start limiting the current. This causes the NTCR to heat up, which in turn will adjust the resistance value and eventually cut off the current. However, once the current is cut off, the NTCR\'s temperature will cool down, and the current will start flowing again. This is why the PTC Resettable Fuses are referred to as "self-resetting".

The PTC Resettable Fuses are designed to protect the connected electronic devices and components from overcurrent or short circuiting, without the need for manual resetting. The SMD1812P014TSA provides superior protection against overcurrents and is perfect for portable electronic devices, always providing reliable and consistent current regulation.

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