MF-LS190S

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PTC resettable fuses, also known as polymeric positive temperature coefficient (PPTC) resettable fuses, are over-current protection devices based on the principle of thermal expansion. They are used to provide adjustable over-current protection for electrical and electronic circuits. The MF-LS190S is a PTC resettable fuse and is used in a variety of different application areas, from protecting consumer goods from electrical damage to powering motors and other large appliances.

MF-LS190S resettable fuses offer reliable protection against over-current, even in harsh environments. The fuse consists of a ceramic body and a heat-sensitive metal element, typically a manganin or nickel–chrome alloy. The element is designed to expand when the current reaches a predetermined level, creating an open circuit and thus shutting off the power.

The working principle of a MF-LS190S PTC resettable fuse is as follows. The device is connected in series with the circuit, and when a current spike or surge occurs, it triggers an internal resistor. This heats up the ceramics and the metal element, causing thermal expansion. This expansion breaks the fuse, and the power to the circuit is cut off.

When the current returns to normal, the thermal expansion disappears and the fuse automatically resets itself. This allows the circuit to be powered again without having to manually reset it. The MF-LS190S has a current rating of 1.8A and a voltage rating of 32V.

The MF-LS190S PTC resettable fuse has many uses in the consumer and industrial sectors. It is particularly suited for use in devices prone to over-heating, such as LED drivers, electric motors, and solar batteries.

The MF-LS190S can also be used in portable electronics and battery compartments to provide electrical protection and prevent overheating. The compact size makes it a popular choice in medical, automotive, and military electronics.

In addition, MF-LS190S PTC resettable fuses are also used in telecom and automotive electronics, in electronic circuit assemblies, and in various other applications. Because they are self-resetting, they reduce the risk of user error and make troubleshooting and repairs easier.

Finally, the MF-LS190S is an affordable and easy-to-install protective device that is ideal for applications requiring reliable and efficient over-current protection. Its ability to reset automatically and its compact size make it one of the most popular PTC resettable fuses available.

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