SMD200F-2

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PTC resettable fuses are a type of self-regulating thermal protection device. They are often used as a supplementary protection device in automotive, electrical, and electronic industries. The SMD200F-2 is a popular PTC resettable fuse from the SMD series. It is manufactured by Chinese components manufacturer SUN REFUSE and is designed for applications in lighting and household appliances.

The SMD200F-2 has a rating of 200V AC/DC and is able to withstand currents of up to 8A. The fuse has a resettable thermostat that activates when the current drawn by the appliance reaches a pre-determined level. This helps protect the appliance from overheating and electrical damage, preventing costly repairs or replacement expenses.

The working principle of the SMD200F-2 resettable fuse is based on the temperature-dependent characteristics of a polymeric Positive Temperature Coefficient (PTC) thermistor. When the current exceeds the normal operating range set for the device, the thermistor\'s resistance increases abruptly, thus increasing the thermal load on the fuse body. This causes the device to trip, reducing the current and protecting the device.

When the current has been reduced, the thermistor cools down again and returns to its initial state. The device then resets itself and allows for normal operation. The SMD200F-2 also has a built-in over-current protection that limits the fault current to a predetermined level.

The SMD200F-2 is a cost-effective solution that is ideal for applications in lighting and household appliances. It can protect devices from over-currents and excessive temperatures, improving reliability and reducing downtime. The fuse also features a low profile design that includes an epoxy-molded housing and quick-connect terminals, making installation and maintenance easy.

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