AGRF700S-1

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PTC Resettable Fuses: AGRF700S-1 Application Field and Working Principle

Positive Temperature Coefficient (PTC) resettable fuses, also known as polySwitch devices, are among the most commonly used components for protection, current limiting, and overcurrent protection solutions in electrical and electronic circuits. The AGRF700S-1 is a bi-directional resettable fuse designed for use in a wide range of consumer and industrial applications. It offers high-performance, efficient protection for DC circuits up to a maximum current of 6A.

What is AGRF700S-1?

The AGRF700S-1 is a resettable fuse made of a PTC thermistor material. It offers protection against electrical overcurrents and is suitable for many applications requiring overcurrent protection. The device is designed to provide an integrated overcurrent protection system with excellent current limiting and short circuit protection capabilities, and provides a rapid, transient-free response, making it ideally suited for use in sensitive, battery-powered applications such as laptop computers and cell phones.

Design and Construction of the AGRF700S-1

The AGRF700S-1 is typically constructed in an axial configuration in which two electrodes are integrated into a thermally-insulated package. This ensures that the thermistor section is maintained at a constant temperature during operation. The temperature-sensitive material is typically a conductive polymer or a metal oxide. It has a positive temperature coefficient (PTC) which increases its resistance as its temperature increases. The fuse is also constructed with an internal resistor in series with the PTC element that is used to limit the maximum current that can flow through the device.

Functional Advantages of AGRF700S-1

The AGRF700S-1 provides circuit protection in the form of overcurrent or short circuit protection. This device has a positive temperature coefficient voltage of 7 volts, a temperature coefficient of +10 mV/°C, a maximum reset voltage of 6V, and a maximum switching current of 6A. It is designed to provide protection from currents up to 17 A, with a maximum hold current of 1.3A. The PTC thermistor material has high temperature stability and heat resistance, making it well-suited for high current applications. In addition, the PTC element also has a low leakage current and excellent noise rejection.

Applications of AGRF700S-1

The AGRF700S-1 is commonly used in a wide range of applications, such as powering laptop computers, cell phones, and consumer electronics. It is also suitable for industrial applications such as automotive equipment, motor control, inverter circuits, and UPS systems.

Conclusion

The AGRF700S-1 is a PTC resettable fuse designed for use in a wide range of applications. It offers high-performance, efficient protection for DC circuits up to a maximum current of 6A, with excellent temperature stability, heat resistance, and low leakage current. Its wide range of applications from high-current consumer electronics to industrial applications make it an ideal protection solution for a variety of electrical and electronic circuits.

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