PFRA.900

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PTC resettable fuses, also known as polyfuse, are current-limiting protection devices designed to replace the typical fuse. PTC resettable fuses are designed to provide current limiting protection, while simultaneously offering overcurrent protection. Unlike a traditional fuse, a PTC resettable fuse can be manually reset after tripping due to an overload, making it an ideal choice for those applications that require frequent resets. The PFRA.900 series of PTC resettable fuses are designed specifically for use in Motor, battery, pump, and inverter applications, and are manufactured with a number of features that make them simple to use and highly reliable.

The PFRA.900 series of resettable fuses is designed with a standard cylindrical body made out of a thermoplastic material. The main body of the fuse contains two metal plates (an anode and a cathode), and two internal resistors. The resistors are connected in series with the current path between the anode and cathode, and when the current flowing between the anode and cathode reach a specific level, the two resistors heat up, causing the thermoplastic body of the fuse to expand in size. This expansion of the body causes the internal connections between the metal plates to be broken, effectively shutting off the current flow and “tripping” the fuse.

Once the PFRA.900 PTC resettable fuse has tripped, it can be reset manually by pressing the reset button on the side of the fuse. When the reset button is pushed, it forces the two internal resistors back into contact with the anode and cathode plates, causing them to cool down and the thermoplastic body of the fuse to return to its original size. This allows current to flow again between the anode and cathode plates of the fuse and restores normal operation.

The PFRA.900 series of PTC resettable fuses are specifically designed to be used in Motor, battery, pump, and inverter applications, and feature a number of unique features that make them well suited to these types of applications. For example, the PFRA.900 series features lightning protection built in to help protect sensitive electronic components and circuits from the effects of a lightning strike. They also feature a high surge capability, allowing them to safely handle very high currents for a short period of time without tripping.

The PFRA.900 series of PTC resettable fuses are also designed to be very user friendly. The reset button is designed to be easily accessible, so that it can be quickly reset in the event of a tripped fuse. The fuses also feature indicator lights that indicate when the fuse has tripped and/or reset, making them simple to use and monitor. Furthermore, the PFRA.900 series of PTC resettable fuses are designed to be highly reliable, featuring an operating temperature range of -40 to +85-C, a maximum voltage rating of 600V, and a maximum current rating of 900A.

The PFRA.900 series of PTC resettable fuses are ideal for use in Motor, battery, pump, and inverter applications due to their high surge capability, lightning protection, user friendly design, and high reliability. They offer an economical and safe alternative to the traditional fuse and are perfect for those applications that require frequent resets. Whether you need to protect your Motor, battery, pump, or inverter, the PFRA.900 series of PTC resettable fuses can provide the protection you need.

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