RKEF050-AP

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PTC Resettable Fuses

A PTC resettable fuse, also known as a Polyfuse, is a temperature-sensitive device used in a variety of industrial, commercial and consumer applications. It is a two-terminal, solid-state device that prevents current overloads, short circuits and other potentially hazardous conditions. This type of fuse is especially useful in applications where fuses need to be reset after tripping. In such cases, the Polyfuse can be reset manually, providing extended protection from damage or system failure even if the fault persists. An example of this can be found in the RKEF050-AP.

Applications of the RKEF050-AP

The RKEF050-AP (Rocker Keyed Enhanced Protection) Polyfuse has a number of applications, which include:

• Protection of lights, motors, and other electric loads
• Automotive segment such as fan controllers, engine and power management systems
• IT and consumer segment such as computers, mobile phones and cameras
• Industrial purposes such as heaters and variable frequency drives

Working Principle of the RKEF050-AP

The RKEF050-AP is a multi-purpose Polyfuse which contains two independent protection systems: a temperature-sensitive Positive Temperature Co-efficient (PTC) element and an active electronic circuit. The PTC element is made of a special material which has an increased resistance in higher temperatures, thus providing an overcurrent protection function. The electronic circuit monitors the load current and once it reaches a certain level (the trip current) it causes the Polyfuse to open. This process has no interruption of service and, depending on the application, the device can be reset manually or automatically.

The RKEF050-AP is an effective way of protecting electrical circuits, and its unique design makes it suitable for a variety of applications. The device offers superior protection against overcurrents, short circuits and other hazardous conditions, making it an ideal choice for systems that need to be reset after tripping. Furthermore, its two independent protection systems provide an extra layer of protection, making it even more reliable and efficient.

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