MF-RX300/72-2 Circuit Protection

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PTC Resettable Fuses are an important class of protective devices for AC systems and appliances. The MF-RX300/72-2 is a unique Polymeric Positive Temperature Coefficient (PPTC) resettable fuse developed with high current and low resistance. It is designed to provide uninterrupted protection for loads in harsh environment with temperature higher than 65°C.

In comparison with traditional fuses, PTC resettable fuses have many advantages. The major benefit of PTC resettable fuses is their ability to reset the circuit after an overload or short circuit. This eliminates the need for constant replacement of costly traditional fuse elements. In contrast, once a traditional fuse is overloaded, the circuit has to be disconnected for it to be replaced. Other advantages include shorter response time, lower standby current, and low on-state resistance.

The MF-RX300/72-2, in particular, is a robust and dependable device. It offers protection for both over-current and over-temperature. This device offers a wide temperature operating range of -40C to + 125C, as well as high current ratings of up to 72A. It is designed with low resistance copper alloy material, making it well-suited for high current applications. The device also offers a low on-state resistance (65mΩ maximum) and fast reaction time of 0.1 s.

The MF-RX300/72-2 has a wide range of applications, including AC line protection, power supplies, motor control systems, power converters, LED lighting systems, industrial equipment, and electronic equipment. It provides excellent over-temperature protection as well as over-current protection with reset capability. It is suitable for use in harsh environment as it offers a wide operating temperature range and a fast reactant time.

The working principle of the MF-RX300/72-2 is based on PPTC thermistor technology. This device uses a resettable characteristic, i.e. it can be reset to a normal or low resistance state after an overload situation and thus restoring the circuit to its original state. The device consists of two parts; a Polymeric Positive Temperature Coefficient (PPTC) thermistor and a heat sink. The thermistor functions by sensing a sudden temperature rise and then limiting the current flow to the load. The heat sink helps dissipate the heat generated due to the high current passing through the device.

In summary, the MF-RX300/72-2 is a robust and reliable Polymeric Positive Temperature Coefficient (PPTC) resettable fuse designed with high current and low resistance for applications in tough environment with temperature higher than 65°C. This device offers over-current and over-temperature protection with reset capability. The device has a wide operating temperature range, low on-state resistance, and fast reaction time. It is suitable for AC line protection, power supplies, motor control systems, power converters, LED lighting systems, industrial equipment, and electronic equipment.

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