MF-RX250-005

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PTC (Positive Temperature Coefficient) Resettable Fuses are an innovative electronic component that provide overcurrent protection and resettable functionality. They are extensively used in applications where a mechanical fuse can risk short circuit or overload conditions, as it does not recover when the fault disappears. The MF-RX250-005 from Cherry Electrical Products Company is an example of such a device.

The MF-RX250-005 is a 250mA AC/DC resettable fuse that offers over-current protection up to 250VAC. This fuse has a 2-pin configuration, with the first pin being the current sensing pin, and the second pin being the power supply pin. The current sensing pin is used to detect over-current by taking advantage of the thermistor\'s self-heating effect caused by the flow of current. When an overload occurs, the fused element will thermally expand to cause an increase in resistance, which prevents further current flow. This will ensure that the circuit will remain off, until the fault has been cleared.

The working principle of the MF-RX250-005 is quite simple. When the current passing through it exceeds the rated current, the thermistor in the fuse will begin to heat up. This heat causes the thermistor to begin to expand, which increases its resistance. This increase in resistance reduces the current flowing through the fuse, eventually bringing it back down to the rated current. At this point, the fuse will begin to cool down, and the resistance will return to normal. The device is now reset and ready to handle the current again.

The MF-RX250-005 can be used in a wide range of applications, including consumer electronics, lighting, home appliances, automotive, industrial equipment, and even military equipment. Additionally, this device is RoHS compliant, making it a good choice for use in most industrial applications. The low profile of the fuse also makes it suitable for installation in tight spaces. Furthermore, the fuse can be used in both AC and DC current systems, making it a versatile device for many different applications.

PTC Resettable Fuses offer a great solution for protecting components from overcurrent. The MF-RX250-005 from Cherry Electrical Products Company is an example of such a device. This fuse is designed to offer over-current protection up to 250VAC and can be used in a wide range of applications. It is RoHS compliant, has a low profile, and can be used in both AC and DC current systems. The working principle of the fuse is based on the thermistor\'s self-heating effect, which causes a thermal expansion that increases resistance and prevents further current flow. Once the fault is cleared, the device will reset and be ready to protect the circuit once again.

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