RGEF1400-2 Circuit Protection

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PTC resettable fuses are electronic components that can be used to protect electronic devices from damage due to overloads or short circuits. The RGEF1400-2 is a polymeric positive temperature coefficient (PPTC) resettable fuse specifically designed for low voltage applications. This fuse offers multiple protection characteristics including over-current, over-voltage, and short-circuit protection.

Description

The RGEF1400-2 is a radial-leaded fuse with a nominal current rating of 14 amps. It has a temperature range of -40°C to 80°C and a maximum rated voltage of 250 volts. The fuse is constructed using a proprietary blend of polymeric materials, including a PPTC thermistor and a bimetal element. It is designed to provide a reliable interruption of power when the pre-determined trip point is reached.

Application Field

The RGEF1400-2 is designed for use in a variety of low-voltage electronic systems. These systems include integrated circuits (ICs), power supply circuits, connectors, and other devices subject to short-circuit, over-current, or over-voltage damage. The fuse is also suitable for use in medical or other critical applications where safety is a paramount design consideration. The combination of low cost, small size, and reliable performance makes the RGEF1400-2 a suitable choice for many electronic design and protection applications.

Working Principle

The working principle of the RGEF1400-2 is based on the temperature-dependent electrical properties of its polymer material. When the current passing through the fuse exceeds the pre-determined trip point, the PPTC thermistor begins to heat up, which causes an increase in its electrical resistance. This rapidly increasing resistance limits the amount of current that can pass through the fuse, effectively shutting off power to the affected device. When the current is reduced or the fault is removed, the PPTC thermistor cools down, which reduces its resistance and allows current to pass through the fuse again.

In cases of overtemperature, overvoltage, and short-circuit faults, the PPTC thermistor and the bimetal elements cooperate to provide additional protection. In the case of an overtemperature fault, the PPTC thermistor causes an increase in resistance to limit the amount of current that can pass through the fuse. This limits the amount of heat that is generated and helps protect the affected device. In the case of overvoltage or short-circuit faults, the bimetal elements quickly open the fuse to shut off power and protect the device from further damage.

Conclusion

The RGEF1400-2 is a polymeric positive temperature coefficient (PPTC) resettable fuse designed for low-voltage applications. It is constructed with a proprietary blend of polymeric materials, including a PPTC thermistor and a bimetal element. These materials cooperate to provide over-current, over-voltage, and short-circuit protection for electronic devices and integrated circuits. The combination of low cost, small size, and reliable performance makes the RGEF1400-2 a suitable choice for many electronic design and protection applications.

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