AGRF500-2 Circuit Protection

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PTC Resettable Fuses provide a reliable solution for protecting a range of consumer, commercial, and industrial applications. The AGRF500-2 from Keystone Electronics is one of the most popular models available. This state-of-the-art fuse, with a maximum rating of 250 volts, features a low ohmic resistance for increased load current. It also has a fast-acting response time and offers true circuit protection regardless of the application.

The AGRF500-2 utilizes Polymeric Positive Temperature Coefficient (PPTC) materials which, when exposed to a specific temperature, will change their electrical properties. When the device is subjected to excessive current, it will instantly shut off the current flow, while also undergoing a significant increase in ohmic resistance. This limits the total current that can be drawn by the application, thus providing protection from potential damage resulting from overcurrent or short circuits.

The working principle of the AGRF500-2 is relatively simple. When normal operating current flows through the device, the low electrical resistance of the PPTC material allows the current to flow through without interruption. However, should the current exceed the fuse\'s rated amperage, the PPTC material will heat up and cause the internal resistance to skyrocket. This rapid increase in resistance effectively shuts off the current flow, thus protecting the circuitry.

When the current exceeds the rated level, the PTC will only trip for a brief length of time and then return to its normal low resistance, providing full protection against current overloads. However, the PTC fuse cannot be used to protect against direct short-circuits as it is designed to shut off current only above the specified overload threshold.

Once the AGRF500-2 has tripped, it needs to be manually reset. This can be accomplished by simply pressing the reset button located on the side of the device. This will reset the device and allow it to be put back into service. The AGRF500-2 is also RoHS compliant, making it an ideal choice for protecting electronic devices from current overloads in a variety of applications.

The AGRF500-2 is suitable for use in a wide range of applications, including residential, industrial, and commercial. It can be used to protect against voltage spikes, current overloads, sustained current overloads, inrush current, and other fault conditions. The AGRF500-2 is also capable of operating at temperatures ranging from -55 °C to +85 °C. This wide operating temperature range makes it an ideal choice for protecting sensitive electronic components in even the most extreme operating environments.

The AGRF500-2 is the ideal choice for protecting a variety of electronics from current overloads. It features a low resistance design and fast-acting response time, while also providing long-term circuit protection. Furthermore, its RoHS compliance makes it suitable for use in a wide range of applications and environments. With its low cost and high reliability, the AGRF500-2 is the perfect choice for protecting your valuable electronics.

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